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Sveta_85 [38]
3 years ago
14

Solve for c. 3 − 7c − 20c = 7(–7c − 19) + 14c c =

Mathematics
2 answers:
Studentka2010 [4]3 years ago
8 0

Answer:

c = -17

Step-by-step explanation:

<u>→Distribute the 7 to (-7c - 19):</u>

3 - 7c - 20c = -49c - 133 + 14c

<u>→Add like terms (-7c and -20c, -49c and 14c):</u>

3 - 27c = -35c - 133

<u>→Add 35c to both sides:</u>

3 + 8c = -133

<u>→Subtract 3 from both sides:</u>

8c = -136

<u>→Divide both sides by 8:</u>

c = -17

OleMash [197]3 years ago
7 0

Answer:

\boxed{c = -17}

Step-by-step explanation:

=  > 3 - 7c - 20c = 7( - 7c - 19) + 14c \\  \\  =  > 3 - 27c = ( - 7c \times 7) - (7 \times 19) + 14c \\  \\  =  > 3 - 27c =  - 49c - 133 + 14c \\  \\  =  > 3 - 27c =  - 35c - 133 \\  \\  =  > 3 - 27c + 35c =  - 133 \\  \\  =  > 3  + 8c =  - 133 \\  \\  =  > 8c =  - 133 - 3 \\  \\  =  > 8c =  - 136 \\  \\  =  > c =  -  \frac{136}{8}  \\  \\  =  > c =  - 17

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