2z-31=-9(z+20)

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Solution for 2z-31=-9(z+20) equation:


Simplifying
2z + -31 = -9(z + 20)

Reorder the terms:
-31 + 2z = -9(z + 20)

Reorder the terms:
-31 + 2z = -9(20 + z)
-31 + 2z = (20 * -9 + z * -9)
-31 + 2z = (-180 + -9z)

Solving
-31 + 2z = -180 + -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.
-31 + 2z + 9z = -180 + -9z + 9z

Combine like terms: 2z + 9z = 11z
-31 + 11z = -180 + -9z + 9z

Combine like terms: -9z + 9z = 0
-31 + 11z = -180 + 0
-31 + 11z = -180

Add '31' to each side of the equation.
-31 + 31 + 11z = -180 + 31

Combine like terms: -31 + 31 = 0
0 + 11z = -180 + 31
11z = -180 + 31

Combine like terms: -180 + 31 = -149
11z = -149

Divide each side by '11'.
z = -13.54545455

Simplifying
z = -13.54545455

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