Simplify: 3x + 4x - 2x
5x
Solve for x: x + 5 = 12
x = 7
Solve for x: 2x + 3 = 11
x = 4
Translate into an equation: "The sum of twice a number and 5 is 15."
Expand: 2(3x - 5)
6x - 10
Solve for x: 4x = 24
x = 6
Solve for x: 5x - 4 = 21
x = 5
A number decreased by 7 is at most 12. Write an equation.
x - 7 = 12
Evaluate: 4x - 7 when x = 3
Solve for x: x/3 = 9
x = 27
Solve for x: 3(x - 2) = 9
x = 5
The sum of three consecutive numbers is 81. Find the numbers.
26, 27, 28
Simplify: (2x + 3) + (5x - 1)
7x + 2
Solve for x: x - 7 = -2
x = 5
Solve for x: (x/4) + 3 = 7
x = 16
The perimeter of a rectangle is 24. If the length is twice the width, write an equation to find the dimensions.
2(2x + x) = 24
Factor: 12x + 18
6(2x + 3)
Solve for x: -3x = 15
x = -5
Solve for x: -2x + 8 = 4
x = 2
A phone plan costs $20 per month plus $0.10 per text. Write an equation to find the total cost (C) for t texts.
C = 20 + 0.10t
Expand and simplify: (x + 2)(x - 3)
x2 - x - 6
Solve for x: 2/5x = 8
x = 20
Solve for x: 4(x + 1) - 3 = 13
x = 3
Solve: The difference between three times a number and 4 is equal to twice the number plus 7.
3x - 4 = 2x + 7
x = 11