5=-8(5+3a)-3(-7-7a)

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Solution for 5=-8(5+3a)-3(-7-7a) equation:


Simplifying
5 = -8(5 + 3a) + -3(-7 + -7a)
5 = (5 * -8 + 3a * -8) + -3(-7 + -7a)
5 = (-40 + -24a) + -3(-7 + -7a)
5 = -40 + -24a + (-7 * -3 + -7a * -3)
5 = -40 + -24a + (21 + 21a)

Reorder the terms:
5 = -40 + 21 + -24a + 21a

Combine like terms: -40 + 21 = -19
5 = -19 + -24a + 21a

Combine like terms: -24a + 21a = -3a
5 = -19 + -3a

Solving
5 = -19 + -3a

Solving for variable 'a'.

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

Add '3a' to each side of the equation.
5 + 3a = -19 + -3a + 3a

Combine like terms: -3a + 3a = 0
5 + 3a = -19 + 0
5 + 3a = -19

Add '-5' to each side of the equation.
5 + -5 + 3a = -19 + -5

Combine like terms: 5 + -5 = 0
0 + 3a = -19 + -5
3a = -19 + -5

Combine like terms: -19 + -5 = -24
3a = -24

Divide each side by '3'.
a = -8

Simplifying
a = -8

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