3(a+b)-(a-2b)=

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Solution for 3(a+b)-(a-2b)= equation:


Simplifying
3(a + b) + -1(a + -2b) = 0
(a * 3 + b * 3) + -1(a + -2b) = 0
(3a + 3b) + -1(a + -2b) = 0
3a + 3b + (a * -1 + -2b * -1) = 0
3a + 3b + (-1a + 2b) = 0

Reorder the terms:
3a + -1a + 3b + 2b = 0

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

Combine like terms: 3b + 2b = 5b
2a + 5b = 0

Solving
2a + 5b = 0

Solving for variable 'a'.

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

Add '-5b' to each side of the equation.
2a + 5b + -5b = 0 + -5b

Combine like terms: 5b + -5b = 0
2a + 0 = 0 + -5b
2a = 0 + -5b
Remove the zero:
2a = -5b

Divide each side by '2'.
a = -2.5b

Simplifying
a = -2.5b

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