3x+7=-4x+21

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Solution for 3x+7=-4x+21 equation:


3x+7=-4x+21

We simplify the equation to the form, which is simple to understand 
3x+7=-4x+21

We move all terms containing x to the left and all other terms to the right. 
+3x+4x=+21-7

We simplify left and right side of the equation. 
+7x=+14

We divide both sides of the equation by 7 to get x. 
x=2

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