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Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks.
Amy and her sister Katie are making baby blankets to sell at a boutique. Amy has already completed 12 blankets and can finish 3 more blankets per day. Katie has already completed 7 blankets and can finish 8 more blankets per day. At some point, they will have completed the same number of blankets. How many blankets will each woman have made? How long will that take?
Each woman will have finished ◻ blankets in ◻ days.

Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks.\newlineAmy and her sister Katie are making baby blankets to sell at a boutique. Amy has already completed 1212 blankets and can finish 33 more blankets per day. Katie has already completed 77 blankets and can finish 88 more blankets per day. At some point, they will have completed the same number of blankets. How many blankets will each woman have made? How long will that take?\newlineEach woman will have finished \square blankets in \square days.

Full solution

Q. Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks.\newlineAmy and her sister Katie are making baby blankets to sell at a boutique. Amy has already completed 1212 blankets and can finish 33 more blankets per day. Katie has already completed 77 blankets and can finish 88 more blankets per day. At some point, they will have completed the same number of blankets. How many blankets will each woman have made? How long will that take?\newlineEach woman will have finished \square blankets in \square days.
  1. Define Variables: Let's define the variables.\newlineLet xx represent the number of days that have passed.\newlineLet yy represent the total number of blankets made by each woman.\newlineAmy's rate of making blankets is 33 per day, and she starts with 1212.\newlineKatie's rate of making blankets is 88 per day, and she starts with 77.
  2. Write Equations: Write the equations based on the given information.\newlineFor Amy: y=3x+12y = 3x + 12 (since she makes 33 blankets per day and has already made 1212)\newlineFor Katie: y=8x+7y = 8x + 7 (since she makes 88 blankets per day and has already made 77)
  3. Substitution to Solve: Use substitution to solve for xx. Since both yy's represent the same number of blankets, we can set the equations equal to each other: 3x+12=8x+73x + 12 = 8x + 7
  4. Solve for x: Solve for x.\newlineSubtract 3x3x from both sides:\newline3x+123x=8x+73x3x + 12 - 3x = 8x + 7 - 3x\newline12=5x+712 = 5x + 7\newlineNow, subtract 77 from both sides:\newline127=5x+7712 - 7 = 5x + 7 - 7\newline5=5x5 = 5x\newlineDivide both sides by 55:\newline55=5x5\frac{5}{5} = \frac{5x}{5}\newlinex=1x = 1
  5. Find Total Blankets: Find the total number of blankets made by each woman after xx days.\newlineSince x=1x = 1, we substitute xx back into either of the original equations to find yy.\newlineUsing Amy's equation: y=3x+12y = 3x + 12\newliney=3(1)+12y = 3(1) + 12\newliney=3+12y = 3 + 12\newliney=15y = 15
  6. Verify Solution: Verify the result with Katie's equation.\newlineUsing Katie's equation: y=8x+7y = 8x + 7\newliney=8(1)+7y = 8(1) + 7\newliney=8+7y = 8 + 7\newliney=15y = 15\newlineSince the result is the same, our solution is consistent.

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