7-c=20

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Solution for 7-c=20 equation: 


Simplifying
7 + -1c = 20

Solving
7 + -1c = 20

Solving for variable 'c'.

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

Add '-7' to each side of the equation.
7 + -7 + -1c = 20 + -7

Combine like terms: 7 + -7 = 0
0 + -1c = 20 + -7
-1c = 20 + -7

Combine like terms: 20 + -7 = 13
-1c = 13

Divide each side by '-1'.
c = -13

Simplifying
c = -13

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