45=-3(21-x)+3(x-2)

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Solution for 45=-3(21-x)+3(x-2) equation:


45=-3(21-x)+3(x-2)

We simplify the equation to the form, which is simple to understand 
45=-3(21-x)+3(x-2)

Reorder the terms in parentheses
45=+(-63+3x)+3*(x-2)

Remove unnecessary parentheses
+45=-63+3x+3+*(+x-2+)

Reorder the terms in parentheses
45=-63+3x+(+3x-6)

Remove unnecessary parentheses
+45=-63+3x+3x-6

We move all terms containing x to the left and all other terms to the right. 
-3x-3x=-63-6-45

We simplify left and right side of the equation. 
-6x=-114

We divide both sides of the equation by -6 to get x. 
x=19

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