Question

solve the following system by substitution. substitute the expression in the second equation into the first equation and solve. 2x-4y= -22 x= -2y+5

Answer 1

2x-4y=-22
x=-2y+5

substitute second equation in first
2(-2y+5)=-22
multiplying
-4y+10=-22
-4y=-32
y=8

put the value of y in any of the above two equations
2x-4(8)=-22
2x-32=-22
2x=10
x=5

x=5,y=8