Question

How do you solve this system by substitution. Y= -5x+3
-x-7y=13

Answer 1

A) Y= -5x+3
B) -x -7y = 13 substituting equation A) into B)
B) -x -7*(-5x +3) = 13

B) -x +35x -21 = 13
B) 34x = 34
x = 1

A) Y= -5*1 +3
A) Y= -2