11z+7=13z-21

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Solution for 11z+7=13z-21 equation:


Simplifying
11z + 7 = 13z + -21

Reorder the terms:
7 + 11z = 13z + -21

Reorder the terms:
7 + 11z = -21 + 13z

Solving
7 + 11z = -21 + 13z

Solving for variable 'z'.

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

Add '-13z' to each side of the equation.
7 + 11z + -13z = -21 + 13z + -13z

Combine like terms: 11z + -13z = -2z
7 + -2z = -21 + 13z + -13z

Combine like terms: 13z + -13z = 0
7 + -2z = -21 + 0
7 + -2z = -21

Add '-7' to each side of the equation.
7 + -7 + -2z = -21 + -7

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

Combine like terms: -21 + -7 = -28
-2z = -28

Divide each side by '-2'.
z = 14

Simplifying
z = 14

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