Answer:
x = 5 and y = -4
Step-by-step explanation:
y = - 3x + 11 ______(1)
5x + y = 21______(2)
Substitute (1) into (2).
5x + (-3x + 11) = 21
5x - 3x + 11 = 21
2x = 21-11
2x = 10
x = 10/2
x = 5
Now substitute x = 5 into (1).
y = -3(5) + 11
y = -15 + 11
y = -4
Hence, x = 5 and y = -4
