Answer:
x= -21
Explanation:
-10x - 135 = 117 + 2x
+10 x = +10x
------------------
-135 = 117 + 12x
-117 -117
-------------
-252 = 12x
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12. 12
x = -21
-10x - 135 = 117 + 2x
-135 = 117+12x
-21 = x
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