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.5*3-4+.75*x=13
We simplify the equation to the form, which is simple to understand
.5*3-4+.75*x=13
Simplifying:
+1.5-4+.75*x=13
Simplifying:
+1.5-4 + 0.75x=13
We move all terms containing x to the left and all other terms to the right.
+ 0.75x=+13-1.5+4
We simplify left and right side of the equation.
+ 0.75x=+15.5
We divide both sides of the equation by 0.75 to get x.
x=20.6666666667
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