Question

Determine the solution to the system of equations by using substitution. Y=4x+10 Y=-5x-10

Answer 1

Steps:
1. Substitute the y in 4x + 10 with -5x-10
-5x-10= 4x + 10
2. Add 5x on both sides
-10= 9x + 10
3. Subtract 10 on both sides
-20= 9x
4. Divide by 9 on both sides
5. Your answer is
X= -20/9

Answer 2

$y=4x+10\\ y=-5x-10\\\\ 4x+10=-5x-10\\ 9x=-20\\ x=-\frac{20}{9}\\\\ y=4\cdot(-\frac{20}{9})+10\\ y=-\frac{80}{9}+\frac{90}{9}\\ y=\frac{10}{9}$