-7(-1+-21a)=(15-25a)

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Solution for -7(-1+-21a)=(15-25a) equation:


Simplifying
-7(-1 + -21a) = (15 + -25a)
(-1 * -7 + -21a * -7) = (15 + -25a)
(7 + 147a) = (15 + -25a)

Remove parenthesis around (15 + -25a)
7 + 147a = 15 + -25a

Solving
7 + 147a = 15 + -25a

Solving for variable 'a'.

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

Add '25a' to each side of the equation.
7 + 147a + 25a = 15 + -25a + 25a

Combine like terms: 147a + 25a = 172a
7 + 172a = 15 + -25a + 25a

Combine like terms: -25a + 25a = 0
7 + 172a = 15 + 0
7 + 172a = 15

Add '-7' to each side of the equation.
7 + -7 + 172a = 15 + -7

Combine like terms: 7 + -7 = 0
0 + 172a = 15 + -7
172a = 15 + -7

Combine like terms: 15 + -7 = 8
172a = 8

Divide each side by '172'.
a = 0.04651162791

Simplifying
a = 0.04651162791

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