The answer is for your paper is 21
Answer:
120 = 3y + t
Step-by-step explanation
because you purchase 3 times as many y then t. Overall, your answer should end up as 120 by using an equation like this.
X - 14 = 15
then to solve that you would add the 14 to both the -14 and the 15, the -14 would cancel out and you would be left with x = 29
Say the percentage increase is 25%. If you have the whole number of 30 then you would multiply 30 by .25. You should therefore get 7.5 once both are multiplied. That means you should add 7.5 to 30, and your final answer will be 37.5.