Question

5(x+2)-3=y x+2(y+1)=5

Answer 1

5(x+2)-3 = y

x + 2(y+1) = 5

5x + 10 - 3 = y

x + 2y + 2 = 5

5x + 7 = y

x + 2(5x + 7) + 2 = 5

5x + 7 = y

x + 10x + 14 + 2 = 5

5x + 7 = y

11x + 16 = 5

5x + 7 = y

11x = 5 - 16

5x + 7 = y

11x = -11

5x + 7 = y

x = -1

-5 + 7 = y

x = -1

2 = y

x = -1

S = { -1; 2 }