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Mumz [18]
3 years ago
5

What is the value of a in the equation 3a+b = 54, when b = 9? 15 18 21 27

Mathematics
2 answers:
liubo4ka [24]3 years ago
8 0
Answer
15
Step by step explanation
3a + 9 = 54
3a = 54-9
a = 45/3
a = 15
Hope it helped
Put your comments below
Ket [755]3 years ago
4 0

Answer:

15

Step-by-step explanation:

3a+9=54

-9        -9

3a=45

:3     :3

a=15

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baherus [9]
The correct answer is:  [C]:  " 5 " .
__________________________________________________________
                                →  " a = 5 " .
__________________________________________________________
Explanation:
__________________________________________________________ 

Given:  " a + 1 <span>− 2 = 4 " ; Solve for "a" ; 

4 + 2 = 6 ; 

6 </span>− 1 = 5 ;   →  a = 5 ;

To check our work:

5 + 1 − 2 = ? 4 ?? ;  

5 + 1 = 6 ; 

6 − 2 = 4.  Yes!

So the answer is:  [C]:  " 5 ". 
_________________________________________________________
                          →   " a = 5 " . 
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