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Ray Of Light [21]
4 years ago
9

3a + 21 = 7 - 4a what's the answer

Mathematics
2 answers:
denis23 [38]4 years ago
8 0
After simplifying a= -2
scoundrel [369]4 years ago
5 0
3a + 21 = 7 - 4a

3a + 4a = 7 - 21

7 a = -14

a = - 14 / 7

a = - 2

hope this helps!
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Need help!! I have no clue
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Answer:

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Step-by-step explanation:

7 2/3 can be "translated" into 3 times 7 plus 2 which is 22, so now it's 22 over 3.

5 5/8 can be "translated" into 8 times 5 plus five is forty five, so now it's 45 over 8.

We now need a common denominator.

Multiples of 8: 8, 16, 24, 32

Multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24

24 are both multiples of 8 and 3.

Now you have to multiply 22 and 8 because 3 times 8 equals 24 and so you have to do it to the numerator.

22*8=176

Now you have to multiply 45 and 3 since 8 times 3 equals 24 and so you have to do it to the numerator, too.

45*3=135

All you have to do now is subtract 176 from 135 which is 41

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