Question

If 5x + 2y = 9 and 9x - 7y = -5, then the correct method to eliminate x from the equations is by

Answer 1

Answer:

Step-by-step explanation:

equations are: 5x+2y=9 and

                        9x-7y= -5

now multiply first equation with 9 and the second with 5

therefore the equations will become,

45x+18y=81 and

45x-35y= -25

now subtract second equation first

then the x terms will get cancelled

and the equation is:

18y-(-35y)= 81-(-25)

53y=106

therefore, y=2

now substitute y=6 in any of the first equations

5x+2(2)=9

therefore by solving the equation,

x=1

ans: x=1 and y=2

Answer 2

Answer:

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