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If 
3x+4y=7, which of the following expressions is equivalent to 
y?
Choose 1 answer:
(A) 
-3x+7
(B) 
-(3)/(4)x+(7)/(4)
(c) 
(3)/(4)x+(7)/(4)
(D) 
3x+7

If 3x+4y=73x+4y=7, which of the following expressions is equivalent to yy?\newlineChoose 11 answer:\newline(A) 3x+7-3x+7\newline(B) 34x\frac{-3}{4}x++ 74\frac{7}{4}\newline(C) 34x\frac{3}{4}x++ 74\frac{7}{4}\newline(D) 3x+73x+7

Full solution

Q. If 3x+4y=73x+4y=7, which of the following expressions is equivalent to yy?\newlineChoose 11 answer:\newline(A) 3x+7-3x+7\newline(B) 34x\frac{-3}{4}x++ 74\frac{7}{4}\newline(C) 34x\frac{3}{4}x++ 74\frac{7}{4}\newline(D) 3x+73x+7
  1. Isolate y: Isolate yy in the equation 3x+4y=73x + 4y = 7.\newlineSubtract 3x3x from both sides:\newline4y=73x4y = 7 - 3x
  2. Subtract 3x3x: Solve for yy by dividing all terms by 44.\newliney=73x4y = \frac{7 - 3x}{4}
  3. Solve for y: Simplify the expression for y.\newliney=(34)x+(74)y = -\left(\frac{3}{4}\right)x + \left(\frac{7}{4}\right)

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