7(z+3)=5(z-1)

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Solution for 7(z+3)=5(z-1) equation:


Simplifying
7(z + 3) = 5(z + -1)

Reorder the terms:
7(3 + z) = 5(z + -1)
(3 * 7 + z * 7) = 5(z + -1)
(21 + 7z) = 5(z + -1)

Reorder the terms:
21 + 7z = 5(-1 + z)
21 + 7z = (-1 * 5 + z * 5)
21 + 7z = (-5 + 5z)

Solving
21 + 7z = -5 + 5z

Solving for variable 'z'.

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

Add '-5z' to each side of the equation.
21 + 7z + -5z = -5 + 5z + -5z

Combine like terms: 7z + -5z = 2z
21 + 2z = -5 + 5z + -5z

Combine like terms: 5z + -5z = 0
21 + 2z = -5 + 0
21 + 2z = -5

Add '-21' to each side of the equation.
21 + -21 + 2z = -5 + -21

Combine like terms: 21 + -21 = 0
0 + 2z = -5 + -21
2z = -5 + -21

Combine like terms: -5 + -21 = -26
2z = -26

Divide each side by '2'.
z = -13

Simplifying
z = -13

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