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(x+30)+(x-55)+(x-45)=360
We simplify the equation to the form, which is simple to understand
(x+30)+(x-55)+(x-45)=360
Remove unnecessary parentheses
x+30+(x-55)+(x-45)=360
Remove unnecessary parentheses
+x+30+x-55+(+x-45+)=+360
Remove unnecessary parentheses
+x+30+x-55+x-45=+360
We move all terms containing x to the left and all other terms to the right.
+1x+1x+1x=+360-30+55+45
We simplify left and right side of the equation.
+3x=+430
We divide both sides of the equation by 3 to get x.
x=143.33333333333
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