Answer:
x=42/44
Explanation:
Because y=8x+13, You will have to insert 8x+13 into y.
-4x-5(8x+13)=23
distribute 5(8x+13)
5(8x)+5(13)
40x+65
Now you have this equation: -4x-40x+65=23.
subtract -65 on both sides
-4x-40x+65-65=23-65
-4x-40x= -42
Solve the x: -4x-40x= -44x
Now you have -44x=-42
Divide 44 on each sides
-x=-42/44
x=42/44
(simplified: 21/22)