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(2z-7)-(7-z)-2z=0
We simplify the equation to the form, which is simple to understand
(2z-7)-(7-z)-2z=0
Remove unnecessary parentheses
2z-7-(7-z)-2z=0
Remove unnecessary parentheses
2z-7-7+1z-2z=0
We move all terms containing z to the left and all other terms to the right.
+2z+1z-2z=0+7+7
We simplify left and right side of the equation.
+1z=+14
We divide both sides of the equation by 1 to get z.
z=14
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