13-c=(c+3)2

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Solution for 13-c=(c+3)2 equation:


Simplifying
13 + -1c = (c + 3) * 2

Reorder the terms:
13 + -1c = (3 + c) * 2

Reorder the terms for easier multiplication:
13 + -1c = 2(3 + c)
13 + -1c = (3 * 2 + c * 2)
13 + -1c = (6 + 2c)

Solving
13 + -1c = 6 + 2c

Solving for variable 'c'.

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

Add '-2c' to each side of the equation.
13 + -1c + -2c = 6 + 2c + -2c

Combine like terms: -1c + -2c = -3c
13 + -3c = 6 + 2c + -2c

Combine like terms: 2c + -2c = 0
13 + -3c = 6 + 0
13 + -3c = 6

Add '-13' to each side of the equation.
13 + -13 + -3c = 6 + -13

Combine like terms: 13 + -13 = 0
0 + -3c = 6 + -13
-3c = 6 + -13

Combine like terms: 6 + -13 = -7
-3c = -7

Divide each side by '-3'.
c = 2.333333333

Simplifying
c = 2.333333333

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