Question

Use addition to solve the linear system of equations. Include all of your work in your final answer.x-y=4 x+2y=4

Answer 1

x = 4 , y = 0

Explanation:

x - y = 4 --------- ( 1 )

x + 2y = 4 -------- ( 2 )

( 1 ) x - 1 => - x + y = - 4 -------------( 3 )

( 2 ) => x + 2y = 4 ----------- ( 2 )

( 2 ) + ( 3 ) => 0 x + 3y = 0

=> y = 0

Substitute y = 0 in ( 1 ) => x - y = 4

=> x - 0 = 4

x = 4