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tatiyna
4 years ago
11

For question 21 ... I need the answer and explain how I got the answer !!!

Mathematics
1 answer:
maks197457 [2]4 years ago
3 0

Answer:

27=3c-3(6-2c)

Open the brackets (multiply 6 and -2c by -3)

27=3c-18+6c

Add 3c and 6c

27=9c-18

Add 18 to both sides

45=9c

Divide by 9

c=5 (45/9)

now to check this just substitute c (5) into the equation

27=(3*5)-18+(6*5)

27=15-18+30

27=30-3

27=27

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