3z+2z-20=15

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Solution for 3z+2z-20=15 equation:


Simplifying
3z + 2z + -20 = 15

Reorder the terms:
-20 + 3z + 2z = 15

Combine like terms: 3z + 2z = 5z
-20 + 5z = 15

Solving
-20 + 5z = 15

Solving for variable 'z'.

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

Add '20' to each side of the equation.
-20 + 20 + 5z = 15 + 20

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

Combine like terms: 15 + 20 = 35
5z = 35

Divide each side by '5'.
z = 7

Simplifying
z = 7

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