a(13)=-7+6(13-1)

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Solution for a(13)=-7+6(13-1) equation: 


Simplifying
a(13) = -7 + 6(13 + -1)

Reorder the terms for easier multiplication:
13a = -7 + 6(13 + -1)

Combine like terms: 13 + -1 = 12
13a = -7 + 6(12)

Multiply 6 * 12
13a = -7 + 72

Combine like terms: -7 + 72 = 65
13a = 65

Solving
13a = 65

Solving for variable 'a'.

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

Divide each side by '13'.
a = 5

Simplifying
a = 5

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