8z-4z+3z=28
Subtract 4z from 8z.
4z+3z=28
Add 4z and 3z.
7z=28
7z=28
Divide each term in 7z=28 by 7.
7z7=287
Cancel the common factor of 7.
Cancel the common factor.
7z7=287
Divide z by 1.
z=287
z=287
Divide 28 by 7.
z=4
z=4
Solve for z 8z-4z+3z=28
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