7(4c-5)-4(6c+5)=-91

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Solution for 7(4c-5)-4(6c+5)=-91 equation:


Simplifying
7(4c + -5) + -4(6c + 5) = -91

Reorder the terms:
7(-5 + 4c) + -4(6c + 5) = -91
(-5 * 7 + 4c * 7) + -4(6c + 5) = -91
(-35 + 28c) + -4(6c + 5) = -91

Reorder the terms:
-35 + 28c + -4(5 + 6c) = -91
-35 + 28c + (5 * -4 + 6c * -4) = -91
-35 + 28c + (-20 + -24c) = -91

Reorder the terms:
-35 + -20 + 28c + -24c = -91

Combine like terms: -35 + -20 = -55
-55 + 28c + -24c = -91

Combine like terms: 28c + -24c = 4c
-55 + 4c = -91

Solving
-55 + 4c = -91

Solving for variable 'c'.

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

Add '55' to each side of the equation.
-55 + 55 + 4c = -91 + 55

Combine like terms: -55 + 55 = 0
0 + 4c = -91 + 55
4c = -91 + 55

Combine like terms: -91 + 55 = -36
4c = -36

Divide each side by '4'.
c = -9

Simplifying
c = -9

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