=-a+(-3a)+15+5a-(-2)

Solution for =-a+(-3a)+15+5a-(-2) equation:

Simplifying
0 = -1a + (-3a) + 15 + 5a + -1(-2)

Multiply -1 * -2
0 = -1a + (-3a) + 15 + 5a + 2

Reorder the terms:
0 = 15 + 2 + -1a + (-3a) + 5a

Combine like terms: 15 + 2 = 17
0 = 17 + -1a + (-3a) + 5a

Combine like terms: -1a + (-3a) = -4a
0 = 17 + -4a + 5a

Combine like terms: -4a + 5a = 1a
0 = 17 + 1a

Solving
0 = 17 + 1a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
0 + -1a = 17 + 1a + -1a
Remove the zero:
-1a = 17 + 1a + -1a

Combine like terms: 1a + -1a = 0
-1a = 17 + 0
-1a = 17

Divide each side by '-1'.
a = -17

Simplifying
a = -17