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z-(-12)=13
We simplify the equation to the form, which is simple to understand
z-(-12)=13
Remove unnecessary parentheses
z+12=13
We move all terms containing z to the left and all other terms to the right.
+1z=+13-12
We simplify left and right side of the equation.
+1z=+1
We divide both sides of the equation by 1 to get z.
z=1
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