x+21=4x-45

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Solution for x+21=4x-45 equation:


x+21=4x-45

We simplify the equation to the form, which is simple to understand 
x+21=4x-45

We move all terms containing x to the left and all other terms to the right. 
+1x-4x=-45-21

We simplify left and right side of the equation. 
-3x=-66

We divide both sides of the equation by -3 to get x. 
x=22

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