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2 years ago

C and d for 20 pts aaaaaaaaaaaaaaaaa

Mathematics

2 answers:

kiruha [24]2 years ago

8 0

Answer:

C. a = 7

D. c = -3

Step-by-step explanation:

C. 7(2a + 3) + 21 = 100+ 40

14a + 21 + 21 = 140

14a = 140 - 21 - 21

14a = 98

a = 7

D. 6+ 14 - 12c = 56

20 - 12c = 56

-12c = 56 - 20

-12c = 36

c = - 3

blsea [12.9K]2 years ago

3 0

Answer:

Step-by-step explanation:

c.7(2a+3)+21=100+40

14a+21+21=140

14a+42=140

14a=140-42

a=98/14

a=7

d.6+14-12c=56

20-12c=56

-12c=56-20

c=36/-12

c=-3

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