3x–5y=49x=2y+7Solve the above equations by elimination

3x–5y=49x=2y+7Solve the above equations by elimination
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3x5y=4
9x=2y+7

Solve the above equations by elimination method and find the value of x.

A.

x=913

B.

x=513

C.

x=513

D.

x=713

Please scroll down to see the correct answer and solution guide.

Right Answer is: A

SOLUTION

3x5y=4......(1)

9x=2y+7
9x2y=7.....(2)

On multiplying equation (1) by 3, we get 

9x15y=12.......(3)

On subtracting (2) from (3), we get

13y=5

y=513

On substituting the value of y in (2), we get

9x=2y+7

x=7+2y9  

x=7101398113×9

x=913