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15z+20=5(2z+10)
We simplify the equation to the form, which is simple to understand
15z+20=5(2z+10)
Reorder the terms in parentheses
15z+20=+(+10z+50)
Remove unnecessary parentheses
+15z+20=+10z+50
We move all terms containing z to the left and all other terms to the right.
+15z-10z=+50-20
We simplify left and right side of the equation.
+5z=+30
We divide both sides of the equation by 5 to get z.
z=6
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