5(a-1)=80

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Solution for 5(a-1)=80 equation: 


Simplifying
5(a + -1) = 80

Reorder the terms:
5(-1 + a) = 80
(-1 * 5 + a * 5) = 80
(-5 + 5a) = 80

Solving
-5 + 5a = 80

Solving for variable 'a'.

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

Add '5' to each side of the equation.
-5 + 5 + 5a = 80 + 5

Combine like terms: -5 + 5 = 0
0 + 5a = 80 + 5
5a = 80 + 5

Combine like terms: 80 + 5 = 85
5a = 85

Divide each side by '5'.
a = 17

Simplifying
a = 17

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