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300 + 0.70x=40 + 0.90x
We simplify the equation to the form, which is simple to understand
300 + 0.70x=40 + 0.90x
We move all terms containing x to the left and all other terms to the right.
+ 0.7x-0.9x=+40-300
We simplify left and right side of the equation.
-0.2x=-260
We divide both sides of the equation by -0.2 to get x.
x=1300
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