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(8/7x+21)=(4/x+3)-(4/7)
We simplify the equation to the form, which is simple to understand
(8/7x+21)=(4/x+3)-(4/7)
Remove unnecessary parentheses
/7x+21=(/x+3)-( + 0.57142857142857)
Remove unnecessary parentheses
/7x+21=/x+3-( + 0.57142857142857)
Remove unnecessary parentheses
/7x+21=/x+3-0.57142857142857
We move all terms containing x to the left and all other terms to the right.
+7x-1x=+3-0.57142857142857-21
We simplify left and right side of the equation.
+6x=-18.571428571429
We divide both sides of the equation by 6 to get x.
x=-3.0952380952381
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