One half of celina's age increased by 12 is her sisters age. if her sister is 18 years old, how old is celia? explain your answer

To find Celina’s age, we can set an equation with unknown:

Let Celina’s age be y, when y is multiplied y by 1/2 and add 12, it will be 18 as mentioned above.

Her age is:



Alternatively,you can also find it in one equation:



Therefore,the Celina is 12 year old.

Hope it helps!

I think the answer is B

Step-by-step explanation:if I get it wrong please don't get mad at me