Answer:
x=-2
Step-by-step explanation:
-2x-7=3(4x+7)
distribute
-2x-7 = 3*4x +3*7
-2x-7 = 12x+21
add 2x to each side
-2x-7+2x = 12x+2x+21
-7 = 14x+21
subtract 21 from each side
-7-21 = 14x+21-21
-28 = 14x
divide by 14
-28/14 = 14x/14
-2 =x
-2x - 7 = 3(4x + 7) Distribute/multiply 3 into (4x + 7)
-2x - 7 = 12x + 21 Add 2x on both sides
-2x + 2x - 7 = 12x + 2x + 21
-7 = 14x + 21 Subtract 21 on both sides
-7 - 21 = 14x + 21 - 21
-28 = 14x Divide 14 on both sides
-2 = x
