15z-15z+5z+4z+2=20

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Solution for 15z-15z+5z+4z+2=20 equation:


Simplifying
15z + -15z + 5z + 4z + 2 = 20

Reorder the terms:
2 + 15z + -15z + 5z + 4z = 20

Combine like terms: 15z + -15z = 0
2 + 0 + 5z + 4z = 20
2 + 5z + 4z = 20

Combine like terms: 5z + 4z = 9z
2 + 9z = 20

Solving
2 + 9z = 20

Solving for variable 'z'.

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

Add '-2' to each side of the equation.
2 + -2 + 9z = 20 + -2

Combine like terms: 2 + -2 = 0
0 + 9z = 20 + -2
9z = 20 + -2

Combine like terms: 20 + -2 = 18
9z = 18

Divide each side by '9'.
z = 2

Simplifying
z = 2

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