Asystem of equations has 1 solution. if 4x – y = 5 is one of the equations, which of the following below could be the other equation?

a) y = –4x + 5
b) y = 4x – 5
c) 2y = 8x – 10
d) –2y = –8x – 10

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?