10c+3(c-7)=18

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Solution for 10c+3(c-7)=18 equation:


Simplifying
10c + 3(c + -7) = 18

Reorder the terms:
10c + 3(-7 + c) = 18
10c + (-7 * 3 + c * 3) = 18
10c + (-21 + 3c) = 18

Reorder the terms:
-21 + 10c + 3c = 18

Combine like terms: 10c + 3c = 13c
-21 + 13c = 18

Solving
-21 + 13c = 18

Solving for variable 'c'.

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

Add '21' to each side of the equation.
-21 + 21 + 13c = 18 + 21

Combine like terms: -21 + 21 = 0
0 + 13c = 18 + 21
13c = 18 + 21

Combine like terms: 18 + 21 = 39
13c = 39

Divide each side by '13'.
c = 3

Simplifying
c = 3

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