Y = - 4x + 15 y = 4x - 41 substitution

Substitute y = - 4x + 15 to the equation y = 4x - 41:

-4x + 15 = 4x - 41 subtract 15 from both sides

-4x = 4x - 56 subtract 4x from both sides

-8x = - 56 divide both sides by (-8)

x = 7

Put the value of x to the first equation:

y = - 4 (7) + 15

y = - 28 + 15

y = - 13

Answer: x = 7 and y = - 13 → (7, - 13)