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6.4=7.8-0.7x
We simplify the equation to the form, which is simple to understand
6.4=7.8-0.7x
We move all terms containing x to the left and all other terms to the right.
+ 0.7x=+7.8-6.4
We simplify left and right side of the equation.
+ 0.7x=+1.4
We divide both sides of the equation by 00.7 to get x.
x=2
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