Question

`3x + 3y = 15, color(white)("dd")3x - 5y = -41` what is the answer?

Answer 1

`y=7 and x=-2`

Explanation:

Solve simultaneously

`3x+3y=15` take `x` common

`x=(15-3y)/3`

Put value of `x` in second equation
That is `3x-5y=-41`

So it will be: `" "3[(15-3y)/3]-5y=-41`

Solve it and find `y`
`15+41=8y" that is "y=56/8 -> y=7`

Now in Any Equation put value 7 in place of `y`

Like `3x+3(7)=15`

So `x=-6/3 -> x=-2`

if you use 2nd equation it will be:
`3x-5(7)=-41`

`3x=-41+35`

`x=-2`