exam Maths Puzzle Numerical Ability

I need your help to solve for X & Y using the addition method.

4x-5y=7
-4x+5y=7

Read Solution (Total 0)

exam Other Question

solve and graph the following equations.

A)x - y = 2
3x + y = -6

B) x + y = 0
x - 4y = 2

C) x + 2y = -1
x - 4y = 1

D) 2x - 3y = 1
3x + y = 1 simplify in the form of a+bi,2y-xi=4+x-i