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x*4=12-x
We simplify the equation to the form, which is simple to understand
x*4=12-x
Simplifying:
+4x=12-x
We move all terms containing x to the left and all other terms to the right.
+4x+1x=+12
We simplify left and right side of the equation.
+5x=+12
We divide both sides of the equation by 5 to get x.
x=2.4
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