Question

Solve the system by substitution.

Answer 1

`\text{Hello there!}\\\\\text{First, solve for x:}\\\\-2.5x+y=13.5\\\\2.25x-y=-12.25\\\\-0.25x=1.25\\\\x=-5\\\\\text{Now, plug in -5 to x in any one of the equations, then solve for y:}\\\\-2.5(-5)+y=13.5\\\\12.5+y=13.5\\\\\text{Subtract both sides by 12.5}\\\\y=1\\\\\boxed{\text{Answer: (-5, 1)}}`