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4x-7+7x>=15
We simplify the equation to the form, which is simple to understand
4x-7+7x>=15
We move all terms containing x to the left and all other terms to the right.
+4x-7x=+7
We simplify left and right side of the equation.
-3x=+7
We divide both sides of the equation by -3 to get x.
x=-2.33333333333
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