69=-1+2(5a+5)

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Solution for 69=-1+2(5a+5) equation:


Simplifying
69 = -1 + 2(5a + 5)

Reorder the terms:
69 = -1 + 2(5 + 5a)
69 = -1 + (5 * 2 + 5a * 2)
69 = -1 + (10 + 10a)

Combine like terms: -1 + 10 = 9
69 = 9 + 10a

Solving
69 = 9 + 10a

Solving for variable 'a'.

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

Add '-10a' to each side of the equation.
69 + -10a = 9 + 10a + -10a

Combine like terms: 10a + -10a = 0
69 + -10a = 9 + 0
69 + -10a = 9

Add '-69' to each side of the equation.
69 + -69 + -10a = 9 + -69

Combine like terms: 69 + -69 = 0
0 + -10a = 9 + -69
-10a = 9 + -69

Combine like terms: 9 + -69 = -60
-10a = -60

Divide each side by '-10'.
a = 6

Simplifying
a = 6

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