126=-7(3+7a)

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


Simplifying
126 = -7(3 + 7a)
126 = (3 * -7 + 7a * -7)
126 = (-21 + -49a)

Solving
126 = -21 + -49a

Solving for variable 'a'.

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

Add '49a' to each side of the equation.
126 + 49a = -21 + -49a + 49a

Combine like terms: -49a + 49a = 0
126 + 49a = -21 + 0
126 + 49a = -21

Add '-126' to each side of the equation.
126 + -126 + 49a = -21 + -126

Combine like terms: 126 + -126 = 0
0 + 49a = -21 + -126
49a = -21 + -126

Combine like terms: -21 + -126 = -147
49a = -147

Divide each side by '49'.
a = -3

Simplifying
a = -3

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