-25(1-10a)-5=4970

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Solution for -25(1-10a)-5=4970 equation: 


Simplifying
-25(1 + -10a) + -5 = 4970
(1 * -25 + -10a * -25) + -5 = 4970
(-25 + 250a) + -5 = 4970

Reorder the terms:
-25 + -5 + 250a = 4970

Combine like terms: -25 + -5 = -30
-30 + 250a = 4970

Solving
-30 + 250a = 4970

Solving for variable 'a'.

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

Add '30' to each side of the equation.
-30 + 30 + 250a = 4970 + 30

Combine like terms: -30 + 30 = 0
0 + 250a = 4970 + 30
250a = 4970 + 30

Combine like terms: 4970 + 30 = 5000
250a = 5000

Divide each side by '250'.
a = 20

Simplifying
a = 20

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