3(a+5)+7b-a+b=

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Solution for 3(a+5)+7b-a+b= equation:


Simplifying
3(a + 5) + 7b + -1a + b = 0

Reorder the terms:
3(5 + a) + 7b + -1a + b = 0
(5 * 3 + a * 3) + 7b + -1a + b = 0
(15 + 3a) + 7b + -1a + b = 0

Reorder the terms:
15 + 3a + -1a + 7b + b = 0

Combine like terms: 3a + -1a = 2a
15 + 2a + 7b + b = 0

Combine like terms: 7b + b = 8b
15 + 2a + 8b = 0

Solving
15 + 2a + 8b = 0

Solving for variable 'a'.

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

Add '-15' to each side of the equation.
15 + 2a + -15 + 8b = 0 + -15

Reorder the terms:
15 + -15 + 2a + 8b = 0 + -15

Combine like terms: 15 + -15 = 0
0 + 2a + 8b = 0 + -15
2a + 8b = 0 + -15

Combine like terms: 0 + -15 = -15
2a + 8b = -15

Add '-8b' to each side of the equation.
2a + 8b + -8b = -15 + -8b

Combine like terms: 8b + -8b = 0
2a + 0 = -15 + -8b
2a = -15 + -8b

Divide each side by '2'.
a = -7.5 + -4b

Simplifying
a = -7.5 + -4b

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