-5+10z+12-4z=21+7z

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Solution for -5+10z+12-4z=21+7z equation:


Simplifying
-5 + 10z + 12 + -4z = 21 + 7z

Reorder the terms:
-5 + 12 + 10z + -4z = 21 + 7z

Combine like terms: -5 + 12 = 7
7 + 10z + -4z = 21 + 7z

Combine like terms: 10z + -4z = 6z
7 + 6z = 21 + 7z

Solving
7 + 6z = 21 + 7z

Solving for variable 'z'.

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

Add '-7z' to each side of the equation.
7 + 6z + -7z = 21 + 7z + -7z

Combine like terms: 6z + -7z = -1z
7 + -1z = 21 + 7z + -7z

Combine like terms: 7z + -7z = 0
7 + -1z = 21 + 0
7 + -1z = 21

Add '-7' to each side of the equation.
7 + -7 + -1z = 21 + -7

Combine like terms: 7 + -7 = 0
0 + -1z = 21 + -7
-1z = 21 + -7

Combine like terms: 21 + -7 = 14
-1z = 14

Divide each side by '-1'.
z = -14

Simplifying
z = -14

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