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189=-6x+2(-7-18)
We move all terms to the left:
189-(-6x+2(-7-18))=0
We add all the numbers together, and all the variables
-(-6x+2(-25))+189=0
We calculate terms in parentheses: -(-6x+2(-25)), so:We get rid of parentheses
-6x+2(-25)
We add all the numbers together, and all the variables
-6x-50
Back to the equation:
-(-6x-50)
6x+50+189=0
We add all the numbers together, and all the variables
6x+239=0
We move all terms containing x to the left, all other terms to the right
6x=-239
x=-239/6
x=-39+5/6
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