7z+3=9z-13

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Solution for 7z+3=9z-13 equation:


Simplifying
7z + 3 = 9z + -13

Reorder the terms:
3 + 7z = 9z + -13

Reorder the terms:
3 + 7z = -13 + 9z

Solving
3 + 7z = -13 + 9z

Solving for variable 'z'.

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

Add '-9z' to each side of the equation.
3 + 7z + -9z = -13 + 9z + -9z

Combine like terms: 7z + -9z = -2z
3 + -2z = -13 + 9z + -9z

Combine like terms: 9z + -9z = 0
3 + -2z = -13 + 0
3 + -2z = -13

Add '-3' to each side of the equation.
3 + -3 + -2z = -13 + -3

Combine like terms: 3 + -3 = 0
0 + -2z = -13 + -3
-2z = -13 + -3

Combine like terms: -13 + -3 = -16
-2z = -16

Divide each side by '-2'.
z = 8

Simplifying
z = 8

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