7=-x+3x

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Solution for 7=-x+3x equation:


7=-x+3x

We simplify the equation to the form, which is simple to understand 
7=-x+3x

We move all terms containing x to the left and all other terms to the right. 
+1x-3x=-7

We simplify left and right side of the equation. 
-2x=-7

We divide both sides of the equation by -2 to get x. 
x=3.5

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