5z+21=7z+43

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Solution for 5z+21=7z+43 equation:


Simplifying
5z + 21 = 7z + 43

Reorder the terms:
21 + 5z = 7z + 43

Reorder the terms:
21 + 5z = 43 + 7z

Solving
21 + 5z = 43 + 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.
21 + 5z + -7z = 43 + 7z + -7z

Combine like terms: 5z + -7z = -2z
21 + -2z = 43 + 7z + -7z

Combine like terms: 7z + -7z = 0
21 + -2z = 43 + 0
21 + -2z = 43

Add '-21' to each side of the equation.
21 + -21 + -2z = 43 + -21

Combine like terms: 21 + -21 = 0
0 + -2z = 43 + -21
-2z = 43 + -21

Combine like terms: 43 + -21 = 22
-2z = 22

Divide each side by '-2'.
z = -11

Simplifying
z = -11

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