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9x=21-5x
We simplify the equation to the form, which is simple to understand
9x=21-5x
We move all terms containing x to the left and all other terms to the right.
+9x+5x=+21
We simplify left and right side of the equation.
+14x=+21
We divide both sides of the equation by 14 to get x.
x=1.5
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