Respuesta :

Answer:

y=3

Step-by-step explanation:

Add the y and divide

7y=21

21/7=3

y=3

4y + 3y = 21

• Add the number that have the same variables. 4y+3y=7y

• 7y = 21 ...divide 7 on both sides and the 7’s will cancel each other out and leave left with....

• 21 divided by 7...

Answer: y = 3
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