1-2a-(3a-10)=3-a

Solution for 1-2a-(3a-10)=3-a equation:

Simplifying
1 + -2a + -1(3a + -10) = 3 + -1a

Reorder the terms:
1 + -2a + -1(-10 + 3a) = 3 + -1a
1 + -2a + (-10 * -1 + 3a * -1) = 3 + -1a
1 + -2a + (10 + -3a) = 3 + -1a

Reorder the terms:
1 + 10 + -2a + -3a = 3 + -1a

Combine like terms: 1 + 10 = 11
11 + -2a + -3a = 3 + -1a

Combine like terms: -2a + -3a = -5a
11 + -5a = 3 + -1a

Solving
11 + -5a = 3 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
11 + -5a + a = 3 + -1a + a

Combine like terms: -5a + a = -4a
11 + -4a = 3 + -1a + a

Combine like terms: -1a + a = 0
11 + -4a = 3 + 0
11 + -4a = 3

Add '-11' to each side of the equation.
11 + -11 + -4a = 3 + -11

Combine like terms: 11 + -11 = 0
0 + -4a = 3 + -11
-4a = 3 + -11

Combine like terms: 3 + -11 = -8
-4a = -8

Divide each side by '-4'.
a = 2

Simplifying
a = 2