Question

Solve the following equation-7x-4y=-4 -9x-5y=-6

Answer 1

Explanation:

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Answer 2

`\boxed{x = 4~~and~~ y = -6}`

.

Explanation:

-7x - 4y = -4 (times 5) -35x - 20y = -20

-9x - 5y = -6 (times 4) -36x - 20y = -24

.

Eliminate both equations

`-35x - 20y = -20`

-36x - 20y = -24

`x = 4`

.

Substitute the value of x to one of equations

`-7x - 4y = -4`

`-7(4) - 4y = -4`

`-28 - 4y = -4`

`-4y = - 4 + 28`

`-4y = 24`

`y = (24)/(-4)`

`y = -6`