Simplify it!
5x + 2x
7x
3 (x+4)
3x+12
A rectangle has a length of x + 3 and a width of 2 inches. What is the simplified expression for the area of the rectangle?
A = 2x + 6 in^2
x + 7 = 15
x=18
Sara has some money. She earns $8 more and now has $20. How much money did she start with?
x + 8 = 20
x=12
8 + 5x - 2x + 4
3x + 12
4 (2x-3)
8x - 12
The length of a rectangle is 6x + 2mm and the width is 4mm. What is the area of the rectangle?
24x + 8 mm^2
4x - 6 = 18
x = 6
A number is doubled and then 6 is added. The result is 20. What is the number? Write an equation and solve.
2x + 6 = 20
x = 7
15 + 4.6x - 2.8x - 3x
15 - 1.2x
3 (2x+4) + 5x - 7
11x+5
The side length of a square is x + 3 inches. If the perimeter of the square is 28 inches, what is the value of x?
x = 4
5x + 4 = 2x + 19
x = 5
An equilateral triangle has side lengths of 2x+3 cm each. If the perimeter is 27 cm, what is the value of x?
3 (2x+3)= 6x+9
6x+9 = 27
x=3
4(3x-2) + 5x - 7
17x - 15
5(3x-4) - 2(x+6)
13x - 32
The length of a rectangle is 6x + 2 mm and the width is 4 mm. What is the perimeter of the rectangle?
12x + 12mm
3(x+4)=24
x=4
Four friends go out to eat. Each friend buys a meal that cost x dollars. They also share a $12 appetizer. If the total bill is $60, how much does each friend's meal cost? Write an equation and solve.
4x+12=60
x=12
3 (2x - 5) - 2 (4x + 3) + 7x
5x - 21
4(2x-3) - 3(x+5) + 2x
7x-27
A rectangle has a length of 3x + 4 inches and a width of 5 inches. Write a simplified expression for both the area and the perimeter of the rectangle?
A = 15x + 20 in^2
P = 6x + 18 in
4(2x-3) = 2(3x+5)
x=11
A submarine is traveling below sea level. It descends 15 ft and reaches a depth of 42 ft below sea level. If x represents it original depth below sea level, write an equation and solve to find its original depth.
x - 15 = -42
x=-27