Answer:
x = 7
Step-by-step explanation:
-3(x - 1) + 8(x - 3) = 6x + 7 - 5x
multiply in "-3" and "8"
-3x + 3 + 8x - 24 = 6x + 7 - 5x
move the unknowns to the left and constants to the right
-3x + 8x - 6x + 5x = 7 - 3 + 24
4x = 28
divide both sides by 4
x = 7