7-9c-(c+12)=25

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Solution for 7-9c-(c+12)=25 equation:


Simplifying
7 + -9c + -1(c + 12) = 25

Reorder the terms:
7 + -9c + -1(12 + c) = 25
7 + -9c + (12 * -1 + c * -1) = 25
7 + -9c + (-12 + -1c) = 25

Reorder the terms:
7 + -12 + -9c + -1c = 25

Combine like terms: 7 + -12 = -5
-5 + -9c + -1c = 25

Combine like terms: -9c + -1c = -10c
-5 + -10c = 25

Solving
-5 + -10c = 25

Solving for variable 'c'.

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

Add '5' to each side of the equation.
-5 + 5 + -10c = 25 + 5

Combine like terms: -5 + 5 = 0
0 + -10c = 25 + 5
-10c = 25 + 5

Combine like terms: 25 + 5 = 30
-10c = 30

Divide each side by '-10'.
c = -3

Simplifying
c = -3

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