3(a+4)+b-a+7(b-3)=

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Solution for 3(a+4)+b-a+7(b-3)= equation:


Simplifying
3(a + 4) + b + -1a + 7(b + -3) = 0

Reorder the terms:
3(4 + a) + b + -1a + 7(b + -3) = 0
(4 * 3 + a * 3) + b + -1a + 7(b + -3) = 0
(12 + 3a) + b + -1a + 7(b + -3) = 0

Reorder the terms:
12 + 3a + b + -1a + 7(-3 + b) = 0
12 + 3a + b + -1a + (-3 * 7 + b * 7) = 0
12 + 3a + b + -1a + (-21 + 7b) = 0

Reorder the terms:
12 + -21 + 3a + -1a + b + 7b = 0

Combine like terms: 12 + -21 = -9
-9 + 3a + -1a + b + 7b = 0

Combine like terms: 3a + -1a = 2a
-9 + 2a + b + 7b = 0

Combine like terms: b + 7b = 8b
-9 + 2a + 8b = 0

Solving
-9 + 2a + 8b = 0

Solving for variable 'a'.

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

Add '9' to each side of the equation.
-9 + 2a + 9 + 8b = 0 + 9

Reorder the terms:
-9 + 9 + 2a + 8b = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 2a + 8b = 0 + 9
2a + 8b = 0 + 9

Combine like terms: 0 + 9 = 9
2a + 8b = 9

Add '-8b' to each side of the equation.
2a + 8b + -8b = 9 + -8b

Combine like terms: 8b + -8b = 0
2a + 0 = 9 + -8b
2a = 9 + -8b

Divide each side by '2'.
a = 4.5 + -4b

Simplifying
a = 4.5 + -4b

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