3(5-z)=-z

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


Simplifying
3(5 + -1z) = -1z
(5 * 3 + -1z * 3) = -1z
(15 + -3z) = -1z

Solving
15 + -3z = -1z

Solving for variable 'z'.

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

Add 'z' to each side of the equation.
15 + -3z + z = -1z + z

Combine like terms: -3z + z = -2z
15 + -2z = -1z + z

Combine like terms: -1z + z = 0
15 + -2z = 0

Add '-15' to each side of the equation.
15 + -15 + -2z = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -2z = 0 + -15
-2z = 0 + -15

Combine like terms: 0 + -15 = -15
-2z = -15

Divide each side by '-2'.
z = 7.5

Simplifying
z = 7.5

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