-13=3(a+1)-5(a+4)

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Solution for -13=3(a+1)-5(a+4) equation:


Simplifying
-13 = 3(a + 1) + -5(a + 4)

Reorder the terms:
-13 = 3(1 + a) + -5(a + 4)
-13 = (1 * 3 + a * 3) + -5(a + 4)
-13 = (3 + 3a) + -5(a + 4)

Reorder the terms:
-13 = 3 + 3a + -5(4 + a)
-13 = 3 + 3a + (4 * -5 + a * -5)
-13 = 3 + 3a + (-20 + -5a)

Reorder the terms:
-13 = 3 + -20 + 3a + -5a

Combine like terms: 3 + -20 = -17
-13 = -17 + 3a + -5a

Combine like terms: 3a + -5a = -2a
-13 = -17 + -2a

Solving
-13 = -17 + -2a

Solving for variable 'a'.

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

Add '2a' to each side of the equation.
-13 + 2a = -17 + -2a + 2a

Combine like terms: -2a + 2a = 0
-13 + 2a = -17 + 0
-13 + 2a = -17

Add '13' to each side of the equation.
-13 + 13 + 2a = -17 + 13

Combine like terms: -13 + 13 = 0
0 + 2a = -17 + 13
2a = -17 + 13

Combine like terms: -17 + 13 = -4
2a = -4

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

Simplifying
a = -2

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