Answer:
x = -12
Explanation:
-6x - 73 = 12x + 143
Add 6x to each side
-6x+6x - 73 = 12x+6x + 143
-73 = 18x+143
Subtract 143 from each side
-73-143 = 18x+143-143
-216 = 18x
Divide by 18
-216/18 =18x/18
-12 =x
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