Easy
Solve: 2x + 7 = 19
x = 6
Solve: 3(x + 4) = 21
x = 3
Solve: x² − 49 = 0
x = 7 or −7
The sum of two numbers is 20. One number is 6 more than the other. Find the numbers.
7 and 13
Guess a number 1–10
1
Solve: 5x − 8 = 17
x = 5
Solve: 4x + 3 = 2x + 15
x = 6
Solve: x² − 10x = 0
x = 0 or 10
A number plus its half is 18. Find the number.
x = 12
Heads or Tails
heads
Solve: (x/4) + 3 = 7
x = 16
Solve: 2(3x − 1) = 16
x = 3
Solve: x² − 5x − 24 = 0
x = 8 or −3
The perimeter of a rectangle is 30. Length is 3 more than width. Find the sides.
width = 6, length = 9
Dice 1–6
6-1
Solve: 3x − 5 = 2x + 9
x = 14
Solve: 5(x − 2) = 3x + 14
x = 12
Solve: x² − 9x + 20 = 0
x = 4 or 5
Two numbers differ by 8 and their sum is 22. Find them.
7 and 15
Red or Black
red
Solve: 4x + 7 = 3x + 18
x = 11
Solve: 3(x + 5) − 2x = 20
x = 5
Solve: x² − 6x + 8 = 0
x = 2 or 4
The sum of three consecutive integers is 72. Find them.
23, 24, 25
Next digit of π after 3.141
5