Q. If 3x+4y=7, which of the following expressions is equivalent to y ?Choose 1 answer:(A) −3x+7(B) −43x+47(C) 43x+47(D) 3x+7
Isolate variable y: Isolate the variable y in the equation 3x+4y=7. To do this, we need to move the term involving x to the other side of the equation by subtracting 3x from both sides. 3x+4y−3x=7−3x This simplifies to: 4y=7−3x
Divide sides by 4: Divide both sides of the equation by 4 to solve for y.44y=4(7−3x)This simplifies to:y=4(7−3x)
Simplify expression: Rewrite the expression in a more simplified form.y=47−43xThis is equivalent to:y=−43x+47
Match with answer choices: Match the simplified expression for y with the given answer choices.The expression y=−43x+47 matches with choice (B) −43x+47.
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