3(a+b-1)=

Solution for 3(a+b-1)= equation:

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

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

Solving
-3 + 3a + 3b = 0

Solving for variable 'a'.

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

Add '3' to each side of the equation.
-3 + 3a + 3 + 3b = 0 + 3

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

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

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

Add '-3b' to each side of the equation.
3a + 3b + -3b = 3 + -3b

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

Divide each side by '3'.
a = 1 + -1b

Simplifying
a = 1 + -1b