Question

x+y=9 & 9x-9y =-27
please ​

Answer 1

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Solution for -9x + 9y = 27 equation:

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-9y' to each side of the equation.

-9x + 9y + -9y = 27 + -9y

Combine like terms : 9y + -9y = 0

-9x + 0 = 27 + -9y

-9x = 27 + -9y

Divide each side by '-9'.

x = -3 + y

Simplifying

x = -3 + y