4(c-1)+5(c-1)=18

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Solution for 4(c-1)+5(c-1)=18 equation:


Simplifying
4(c + -1) + 5(c + -1) = 18

Reorder the terms:
4(-1 + c) + 5(c + -1) = 18
(-1 * 4 + c * 4) + 5(c + -1) = 18
(-4 + 4c) + 5(c + -1) = 18

Reorder the terms:
-4 + 4c + 5(-1 + c) = 18
-4 + 4c + (-1 * 5 + c * 5) = 18
-4 + 4c + (-5 + 5c) = 18

Reorder the terms:
-4 + -5 + 4c + 5c = 18

Combine like terms: -4 + -5 = -9
-9 + 4c + 5c = 18

Combine like terms: 4c + 5c = 9c
-9 + 9c = 18

Solving
-9 + 9c = 18

Solving for variable 'c'.

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

Add '9' to each side of the equation.
-9 + 9 + 9c = 18 + 9

Combine like terms: -9 + 9 = 0
0 + 9c = 18 + 9
9c = 18 + 9

Combine like terms: 18 + 9 = 27
9c = 27

Divide each side by '9'.
c = 3

Simplifying
c = 3

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