-7+-21a=15-25a

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


Simplifying
-7 + -21a = 15 + -25a

Solving
-7 + -21a = 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 + -21a + 25a = 15 + -25a + 25a

Combine like terms: -21a + 25a = 4a
-7 + 4a = 15 + -25a + 25a

Combine like terms: -25a + 25a = 0
-7 + 4a = 15 + 0
-7 + 4a = 15

Add '7' to each side of the equation.
-7 + 7 + 4a = 15 + 7

Combine like terms: -7 + 7 = 0
0 + 4a = 15 + 7
4a = 15 + 7

Combine like terms: 15 + 7 = 22
4a = 22

Divide each side by '4'.
a = 5.5

Simplifying
a = 5.5

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