7z+2z-7=21+8

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Solution for 7z+2z-7=21+8 equation:


Simplifying
7z + 2z + -7 = 21 + 8

Reorder the terms:
-7 + 7z + 2z = 21 + 8

Combine like terms: 7z + 2z = 9z
-7 + 9z = 21 + 8

Combine like terms: 21 + 8 = 29
-7 + 9z = 29

Solving
-7 + 9z = 29

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '7' to each side of the equation.
-7 + 7 + 9z = 29 + 7

Combine like terms: -7 + 7 = 0
0 + 9z = 29 + 7
9z = 29 + 7

Combine like terms: 29 + 7 = 36
9z = 36

Divide each side by '9'.
z = 4

Simplifying
z = 4

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