2z+45=21

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Solution for 2z+45=21 equation: 


Simplifying
2z + 45 = 21

Reorder the terms:
45 + 2z = 21

Solving
45 + 2z = 21

Solving for variable 'z'.

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

Add '-45' to each side of the equation.
45 + -45 + 2z = 21 + -45

Combine like terms: 45 + -45 = 0
0 + 2z = 21 + -45
2z = 21 + -45

Combine like terms: 21 + -45 = -24
2z = -24

Divide each side by '2'.
z = -12

Simplifying
z = -12

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