Answer:
x= -4, y= -7
Explanation:
First, label the 2 equations.
6x -5y= 11 -----(1)
y= 7x +21 -----(2)
Substitute (2) into (1) so that the first equation is only written in terms of x.
6x -5(7x +21)= 11
6x -5(7x) -5(21)= 11 (Expand)
6x -35x -105= 11
-29x= 11 +105 (Simplify, +105 on both sides)
-29x= 116
x= 116 ÷(-29)
x= -4
Substitute x= -4 into (2):
y= 7(-4) +21
y= -28 +21
y= -7