2(z-2)-5=3z-21

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Solution for 2(z-2)-5=3z-21 equation:


Simplifying
2(z + -2) + -5 = 3z + -21

Reorder the terms:
2(-2 + z) + -5 = 3z + -21
(-2 * 2 + z * 2) + -5 = 3z + -21
(-4 + 2z) + -5 = 3z + -21

Reorder the terms:
-4 + -5 + 2z = 3z + -21

Combine like terms: -4 + -5 = -9
-9 + 2z = 3z + -21

Reorder the terms:
-9 + 2z = -21 + 3z

Solving
-9 + 2z = -21 + 3z

Solving for variable 'z'.

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

Add '-3z' to each side of the equation.
-9 + 2z + -3z = -21 + 3z + -3z

Combine like terms: 2z + -3z = -1z
-9 + -1z = -21 + 3z + -3z

Combine like terms: 3z + -3z = 0
-9 + -1z = -21 + 0
-9 + -1z = -21

Add '9' to each side of the equation.
-9 + 9 + -1z = -21 + 9

Combine like terms: -9 + 9 = 0
0 + -1z = -21 + 9
-1z = -21 + 9

Combine like terms: -21 + 9 = -12
-1z = -12

Divide each side by '-1'.
z = 12

Simplifying
z = 12

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