64=8(1-7a)-7(7+7a)

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Solution for 64=8(1-7a)-7(7+7a) equation:


Simplifying
64 = 8(1 + -7a) + -7(7 + 7a)
64 = (1 * 8 + -7a * 8) + -7(7 + 7a)
64 = (8 + -56a) + -7(7 + 7a)
64 = 8 + -56a + (7 * -7 + 7a * -7)
64 = 8 + -56a + (-49 + -49a)

Reorder the terms:
64 = 8 + -49 + -56a + -49a

Combine like terms: 8 + -49 = -41
64 = -41 + -56a + -49a

Combine like terms: -56a + -49a = -105a
64 = -41 + -105a

Solving
64 = -41 + -105a

Solving for variable 'a'.

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

Add '105a' to each side of the equation.
64 + 105a = -41 + -105a + 105a

Combine like terms: -105a + 105a = 0
64 + 105a = -41 + 0
64 + 105a = -41

Add '-64' to each side of the equation.
64 + -64 + 105a = -41 + -64

Combine like terms: 64 + -64 = 0
0 + 105a = -41 + -64
105a = -41 + -64

Combine like terms: -41 + -64 = -105
105a = -105

Divide each side by '105'.
a = -1

Simplifying
a = -1

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