21+9c=4(7c-3)

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Solution for 21+9c=4(7c-3) equation:


Simplifying
21 + 9c = 4(7c + -3)

Reorder the terms:
21 + 9c = 4(-3 + 7c)
21 + 9c = (-3 * 4 + 7c * 4)
21 + 9c = (-12 + 28c)

Solving
21 + 9c = -12 + 28c

Solving for variable 'c'.

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

Add '-28c' to each side of the equation.
21 + 9c + -28c = -12 + 28c + -28c

Combine like terms: 9c + -28c = -19c
21 + -19c = -12 + 28c + -28c

Combine like terms: 28c + -28c = 0
21 + -19c = -12 + 0
21 + -19c = -12

Add '-21' to each side of the equation.
21 + -21 + -19c = -12 + -21

Combine like terms: 21 + -21 = 0
0 + -19c = -12 + -21
-19c = -12 + -21

Combine like terms: -12 + -21 = -33
-19c = -33

Divide each side by '-19'.
c = 1.736842105

Simplifying
c = 1.736842105

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