At a school concert the total value of tickets sold was $2410. Student tickets sold for $7 and adult tickets sold for $12. The number of adult tickets sold was 7 less than 3 times the number of student tickets. Find the number of student tickets sold.

Step-by-step explanation:

12a + 7s = 2410

a = 3s- 7

12(3s - 7) + 7s = 2410

36s - 84 + 7s = 2410

43s - 84 = 2410

43s = 2494

s = 58 student tickets

a = 3(58) - 7

a = 174 - 7 = 167 adult tickets

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign