42z-75=2z-21

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Solution for 42z-75=2z-21 equation:


Simplifying
42z + -75 = 2z + -21

Reorder the terms:
-75 + 42z = 2z + -21

Reorder the terms:
-75 + 42z = -21 + 2z

Solving
-75 + 42z = -21 + 2z

Solving for variable 'z'.

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

Add '-2z' to each side of the equation.
-75 + 42z + -2z = -21 + 2z + -2z

Combine like terms: 42z + -2z = 40z
-75 + 40z = -21 + 2z + -2z

Combine like terms: 2z + -2z = 0
-75 + 40z = -21 + 0
-75 + 40z = -21

Add '75' to each side of the equation.
-75 + 75 + 40z = -21 + 75

Combine like terms: -75 + 75 = 0
0 + 40z = -21 + 75
40z = -21 + 75

Combine like terms: -21 + 75 = 54
40z = 54

Divide each side by '40'.
z = 1.35

Simplifying
z = 1.35

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