At the start of a birthday party, there are 3 times more boys than girls. after 4 boys and 4 girls left the party, there were 4 times more boys than girls. how many boys were there at the start of the party

Step-by-step explanation:

Let

x------> number of boys at the start of the party

y-----> number of girls at the start of the party

we know that

------> equation A

-----> equation B

substitute equation A in equation B and solve for y

Find the value of x

 ------>

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.

answer: 7270

step-by-step explanation: