30=7+13+c

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Solution for 30=7+13+c equation:


Simplifying
30 = 7 + 13 + c

Combine like terms: 7 + 13 = 20
30 = 20 + c

Solving
30 = 20 + c

Solving for variable 'c'.

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

Add '-1c' to each side of the equation.
30 + -1c = 20 + c + -1c

Combine like terms: c + -1c = 0
30 + -1c = 20 + 0
30 + -1c = 20

Add '-30' to each side of the equation.
30 + -30 + -1c = 20 + -30

Combine like terms: 30 + -30 = 0
0 + -1c = 20 + -30
-1c = 20 + -30

Combine like terms: 20 + -30 = -10
-1c = -10

Divide each side by '-1'.
c = 10

Simplifying
c = 10

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