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2.1=78-x/1
We simplify the equation to the form, which is simple to understand
2.1=78-x/1
Simplifying:
2.1=78-1x
We move all terms containing x to the left and all other terms to the right.
+1x=+78-2.1
We simplify left and right side of the equation.
+1x=+75.9
We divide both sides of the equation by 01 to get x.
x=75.9
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