Equation 1: -5x + 4y = 3
Equation 2: x = 2y - 15
Since Equation 2 is already solved for x, we will use this value of x in the firs equation:
-5x + 4y = 3
-5(2y - 15) + 4y = 3
-10y + 75 + 4y = 3
-6y = 3 - 75 = -72
y = -72/-6 = 12
y = 12
Using this value of y in equation 2:
x = 2y -15
x = 2(12) - 15
x = 24 -15
x = 9
Answer:
x = 9
y = 12