Question

Solve each system using substitution.
2=2y-x
23=5y-4x

Answer 1

Solve the first equation for x:
2 = 2y - x
Add x to both sides:
x + 2 = 2y
Subtract 2 from both sides:
x = 2y - 2
Now substitute what x equals in second equation.
23 = 5y - 4x
23 = 5y - 4(2y - 2)
Simplify the right side:
23 = 5y - 8y + 8
23 = -3y + 8
Subtract 8 from both sides:
15 = -3y
Divide both sides by -3:
-5 = y
Now that you have y = -5, substitute this value of y in first equation:
2 = 2y - x
2 = 2(-5) - x
2 = -10 - x
12 = -x
x = -12
Answer: x = -12, y = -5

Answer 2

ty :D

Answer 3

wlcm