12x+9x=12-9

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Solution for 12x+9x=12-9 equation:


12x+9x=12-9

We simplify the equation to the form, which is simple to understand 
12x+9x=12-9

We move all terms containing x to the left and all other terms to the right. 
+12x+9x=+12-9

We simplify left and right side of the equation. 
+21x=+3

We divide both sides of the equation by 21 to get x. 
x=0.14285714285714

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