126=-7(-5a-3)

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Solution for 126=-7(-5a-3) equation:


Simplifying
126 = -7(-5a + -3)

Reorder the terms:
126 = -7(-3 + -5a)
126 = (-3 * -7 + -5a * -7)
126 = (21 + 35a)

Solving
126 = 21 + 35a

Solving for variable 'a'.

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

Add '-35a' to each side of the equation.
126 + -35a = 21 + 35a + -35a

Combine like terms: 35a + -35a = 0
126 + -35a = 21 + 0
126 + -35a = 21

Add '-126' to each side of the equation.
126 + -126 + -35a = 21 + -126

Combine like terms: 126 + -126 = 0
0 + -35a = 21 + -126
-35a = 21 + -126

Combine like terms: 21 + -126 = -105
-35a = -105

Divide each side by '-35'.
a = 3

Simplifying
a = 3

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