Find the solution of the system of equations using the substitution method.
1. y = 2x
2. y = x + 3
x + y = 9
2x + 2y = 38

Substitute for x in the second equation:-

2(y + 3) + y = 9

2y + 6 + y = 9

3y = 9 - 6 = 3

so y =  3/3  = 1

x = 1 + 3 = 4

So you answer is x = 4 and y = 1.

Step-by-step explanation:

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.