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0.4(3z+7)+12.2=0.6(3z-5)
We simplify the equation to the form, which is simple to understand
0.4(3z+7)+12.2=0.6(3z-5)
Reorder the terms in parentheses
+(+1.2z+2.8)+12.2=0.6*(3z-5)
Remove unnecessary parentheses
+1.2z+2.8+12.2=0.6+*(+3z-5+)
Reorder the terms in parentheses
+1.2z+2.8+12.2=+(+1.8z-3)
Remove unnecessary parentheses
+1.2z+2.8+12.2=+1.8z-3
We move all terms containing z to the left and all other terms to the right.
+1.2z-1.8z=-3-2.8-12.2
We simplify left and right side of the equation.
-0.6z=-18
We divide both sides of the equation by -0.6 to get z.
z=30
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