2c-7-8c+4=21

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Solution for 2c-7-8c+4=21 equation:


Simplifying
2c + -7 + -8c + 4 = 21

Reorder the terms:
-7 + 4 + 2c + -8c = 21

Combine like terms: -7 + 4 = -3
-3 + 2c + -8c = 21

Combine like terms: 2c + -8c = -6c
-3 + -6c = 21

Solving
-3 + -6c = 21

Solving for variable 'c'.

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

Add '3' to each side of the equation.
-3 + 3 + -6c = 21 + 3

Combine like terms: -3 + 3 = 0
0 + -6c = 21 + 3
-6c = 21 + 3

Combine like terms: 21 + 3 = 24
-6c = 24

Divide each side by '-6'.
c = -4

Simplifying
c = -4

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