Question

if y= x/2 and 3x +4y then x=
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Answer 1

Answer:

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Step-by-step explanation:

Y=x/2 implies 2y=x

substitute it in the other equation;

3(2y) +4y= 20

6y + 4y = 20

10y = 20

y = 2

if y=2, x= 2y, so x= 2x2 =4