Answer:
x = 8
y = 11
Step-by-step explanation:
Replace the y in first equation with 2x - 5 since it's equal to it
3x - 4(2x - 5) = -20 multiply 4 with inside the parenthesis
3x - 8x + 20 = -20 add like terms
-5x + 20 = -20 subtract 20 from both sides
-5x = -40 divide both sides by -5
x = 8 now use this to find y
y = 2x - 5
y = 2*8 - 5
y = 11
