Question

Solve each system using substitution. tell whether the system has one solution, infinitely many solutions, or no Solution.

1.) y=2x -1
2x +2y= 22

Answer 1

since y=2x-1,

2x + 2(2x-1) = 22
6x = 24
x = 4
so, y = 2x-1 = 7

one solution.