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BARSIC [14]
3 years ago
6

15. Solve: 21-3y=36-6y A) 19 B) 5 C) -5/3 D) -19

Mathematics
2 answers:
juin [17]3 years ago
6 0
<span>21-3y=36-6y        +3y
21 = 36 - 3y          -36
-36+21 = -3y
- 15 = - 3y              ÷ -3
5 = y

Choice: B


</span>
pav-90 [236]3 years ago
6 0
21 - 3y = 36 - 6y

We're essentially just trying to get both of the "y's" with one another on the same side.

So, we must add 6y to both sides.

21 -3y + 6y = 36

Now, we must subtract 21 from both sides.

-3y + 6y = 36 - 21

Simplify.

3y = 15

Divide both sides by 3.

y = 15/3

y = 5

So, B) 5 is correct

~Hope I helped!~
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