Question

Solve each system of equations using substitution. y=x-2 2x+y=4

Answer 1

To solve this system of equations, we can use substitution:

y=x-2 (1)

2x+y=4 (2)

As the variable y is already isolated on the equation 1, we are going to substitute (1) on (2):

2x+(x-2)=4

2x+x-2=4

3x=4+2

3x=6

x=6/3

x=2

Since x=2, now we can substitute x=2 on equation (2)

2(2)+y=4

4+y=4

y=4-4

y=0