Question

if 3y+7 is equal to 16 then y_____​

Answer 1

Answer:

Step-by-step explanation:

Answer

3x+5y=9-----(1)

5x+3y=7-----(2)

multiplying eq(1) by 5 & eq(2) by 3 we get

15x+25y=45

-15x ± 9y= - 21

_____________

    16y=24

y=  

16

24

​  

=  

2

3

​  

 

[y=  

2

3

​  

] and  x=  

3

9−5x  

2

3

​  

 

​  

=  

2

−1

​  

 

Hence[x=  

2

1

​  

]& [y=  

2

3

​  

]

so x+y=  

2

1

​  

+  

2

3

​  

=2

Answer 2

Answer:

$3y + 7 = 16 \\ 3y = 16 - 7 \\ 3y = 9 \\ y = \frac{9}{3} \\ y = \: \: \underline{ \underline{3}}$