To solve for x, first add 7 to both sides of the equation:
4x = 16.
Then, divide both sides by 4:
x = 16 ÷ 4 = 5.
According to the order of operations (PEMDAS), you perform multiplication before addition. So, first multiply 3 × 5 = 15, and then add 8 to get 8 + 15 = 23.
Explanation: Average speed is calculated by dividing the total distance by the total time. So, divide 180 miles by 3 hours:
180 ÷ 3 = 60 mph.
According to the order of operations (PEMDAS), square the 5 first, then multiply 6 × 3, and perform addition/subtraction from left to right.
5² = 25, so the expression becomes:
25 - 18 + 2 = 7.
The area of a rectangle is calculated by multiplying the length by the width. So, 12 meters × 7 meters = 84 square meters.
