What is the first step in evaluating this expression?

15 + 20 ÷ (10 – 7) + 12

The first step to solve the expression is to solve () i.e. (10-7) will be solved first.

Step-by-step explanation:

Any algebraic expression is solved as per BODMAS rule i.e. in the following sequential order (one after the other).

B - Bracket i.e. ()

O - Of

D - Division

M - Multiplication

A - Addition

S - Subtraction

So, as per BODMAS rule, the bracket  i.e. () expression will be solved at first.

Solving the expression:

15 + 20 ÷ (10 – 7) + 12

15 + 20 ÷ 3 + 12

15 + 6.67 + 12

21.67 + 12

33.67

Hence, (10-7) will be evaluated first.

first one because it can't have a fraction in it

step-by-step explanation:

94

step-by-step explanation:

average the numbers and use a variable to figure out the minimum to get a 90.

(79+94+91+92+x)/5=90

x = 94