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Aspen has 306 green beads and 210 silver beads. For every 
5cm of a belt that Aspen sews, they use 40 green beads and 24 silver beads.
After how many centimeters of the belt will Aspen have equal numbers of green and silver beads left?
cm

Aspen has 306306 green beads and 210210 silver beads. For every 5cm5\text{cm} of a belt that Aspen sews, they use 4040 green beads and 2424 silver beads. After how many centimeters of the belt will Aspen have equal numbers of green and silver beads left?cm\text{cm}

Full solution

Q. Aspen has 306306 green beads and 210210 silver beads. For every 5cm5\text{cm} of a belt that Aspen sews, they use 4040 green beads and 2424 silver beads. After how many centimeters of the belt will Aspen have equal numbers of green and silver beads left?cm\text{cm}
  1. Setting up equation: Let xx be the number of centimeters of belt needed for the beads to be equal. \newlineRemaining green beads = 30640x5306 - \frac{40x}{5}\newlineRemaining silver beads = 21024x5210 - \frac{24x}{5}\newlineLet's set the two expressions equal:\newline30640x5=21024x5306 - \frac{40x}{5} = 210 - \frac{24x}{5}
  2. Equation solving: Solve the equation to find the value of xx.\newlineSubtract both sides of the equation by 210210:\newline30640x5210=24x5306 - \frac{40x}{5} -210 = - \frac{24x}{5}\newline9640x5=24x596 - \frac{40x}{5} = - \frac{24x}{5}\newlineNow, add both sides of the equation by 40x5\frac{40x}{5}: \newline96=40x524x596 = \frac{40x}{5} - \frac{24x}{5} \newline96=16x596 = \frac{16x}{5}
  3. Solve for xx: Multiply both sides of the equation by 516\frac{5}{16}:\newline96×516=16x5×51696 \times \frac{5}{16} = \frac{16x}{5} \times \frac{5}{16}\newline6×5=x6 \times 5 = x\newline x=30x = 30\newline After 3030 centimeters of the belt, Aspen will have an equal number of green and silver beads left.

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