18=-(2a-6)

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Solution for 18=-(2a-6) equation:


18=-(2a-6)

We simplify the equation to the form, which is simple to understand 
18=-(2a-6)

Remove unnecessary parentheses
18=-2a+6

We move all terms containing a to the left and all other terms to the right. 
+2a=+6-18

We simplify left and right side of the equation. 
+2a=-12

We divide both sides of the equation by 02 to get a. 
a=-6

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