-7-3(1-2c)=21

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Solution for -7-3(1-2c)=21 equation: 


Simplifying
-7 + -3(1 + -2c) = 21
-7 + (1 * -3 + -2c * -3) = 21
-7 + (-3 + 6c) = 21

Combine like terms: -7 + -3 = -10
-10 + 6c = 21

Solving
-10 + 6c = 21

Solving for variable 'c'.

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

Add '10' to each side of the equation.
-10 + 10 + 6c = 21 + 10

Combine like terms: -10 + 10 = 0
0 + 6c = 21 + 10
6c = 21 + 10

Combine like terms: 21 + 10 = 31
6c = 31

Divide each side by '6'.
c = 5.166666667

Simplifying
c = 5.166666667

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