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15,8x+7,8-8,4x=30
We simplify the equation to the form, which is simple to understand
15,8x+7,8-8,4x=30
We move all terms containing x to the left and all other terms to the right.
+15.8x-8.4x=+30-7.8
We simplify left and right side of the equation.
+7.4x=+22.2
We divide both sides of the equation by 7.4 to get x.
x=3
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