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750-4x=900-7x
We simplify the equation to the form, which is simple to understand
750-4x=900-7x
We move all terms containing x to the left and all other terms to the right.
-4x+7x=+900-750
We simplify left and right side of the equation.
+3x=+150
We divide both sides of the equation by 3 to get x.
x=50
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