[5*(5a-5)-120]*5-25=125

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Solution for [5*(5a-5)-120]*5-25=125 equation:


Simplifying
[5(5a + -5) + -120] * 5 + -25 = 125

Reorder the terms:
[5(-5 + 5a) + -120] * 5 + -25 = 125
[(-5 * 5 + 5a * 5) + -120] * 5 + -25 = 125
[(-25 + 25a) + -120] * 5 + -25 = 125

Reorder the terms:
[-25 + -120 + 25a] * 5 + -25 = 125

Combine like terms: -25 + -120 = -145
[-145 + 25a] * 5 + -25 = 125

Reorder the terms for easier multiplication:
5[-145 + 25a] + -25 = 125
[-145 * 5 + 25a * 5] + -25 = 125
[-725 + 125a] + -25 = 125

Reorder the terms:
-725 + -25 + 125a = 125

Combine like terms: -725 + -25 = -750
-750 + 125a = 125

Solving
-750 + 125a = 125

Solving for variable 'a'.

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

Add '750' to each side of the equation.
-750 + 750 + 125a = 125 + 750

Combine like terms: -750 + 750 = 0
0 + 125a = 125 + 750
125a = 125 + 750

Combine like terms: 125 + 750 = 875
125a = 875

Divide each side by '125'.
a = 7

Simplifying
a = 7

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