Question

Solve the system of linear equations by substitution x-y=-4 2x+y=4

Answer 1

Given:

x-y=-4

2x+y=4

Explanation:

x-y=-4

2x+y=4

add both the equation, we get

⇒ x-y=-4

2x+y=4

⇒3x=-4+4

⇒3x=0

⇒x=0

∴ to find the value of y, put the value of x in any one equation

⇒x-y=-4

⇒0-y=-4

⇒-y=-4

⇒y=4

∴ x=0, y=4