Question

2x-45=y,2y-21=x solve using substituiton method

Answer 1

Answer:

Step-by-step explanation:

2x-45 = y

Multiply by 2 both aides

2 (2x-45) = 2y

4x-90=2y

Substract 21 from both sides

4x-90-21=2y - 21

4x - 111 = 2y -21

x = 2y-21

4x - 111 = x

4x - x = 111

3x = 111

x = 111/3

x = 37

x= 2y - 21

37 = 2y -21

37+21 = 2y

2y = 58

y=58/2

y=29