Assessment
Evaluate Yourself!
Evaluate Yourself!
x - 3 = 7
x = 3 + 7
x = 10
Checking:
10 - 3 = 10
10 = 10
✔
9x = 81
x = 9 ÷ 81
x = 9
Checking:
9(9) = 81
81 = 81
✔
x ÷ 5 = 9
x = 5 x 9
x = 45
Checking:
45 ÷ 5 = 9
9=9
✔
x + 12 = 20
x = 20 - 12
x = 8
Checking:
8 + 12 = 20
20 = 20
✔
x ÷ 8 = 3
x = 8 x 3
x = 24
Checking:
24 ÷ 8 = 3
3= 3
✔
x + 15 = 25
x = 15 - 25
x = 10
Checking:
10 + 15 = 25
25= 25
✔
4x = 28
x = 28 ÷ 4
x = 7
Checking
4 x 7 = 28
28=28
✔
x - 6 = 11
x = 6 + 11
x = 17
Checking:
17 - 6 = 11
11 = 11
✔
x + 18 = 50
Subtract 18 from both sides:
x = 50 - 18
x = 32
You have $32 left.
Checking:
32 + 18 = 50
50 = 50
✔
60x = 180
Divide both sides by 60:
x= 180 ÷ 60
x=3
The car travels 180 miles.
Checking:
60 x 3 = 180
180 = 180
✔
x + 20 = 30
Subtract 20 from both sides:
x = 30 - 20
x= 10
You had $10 before the deposit.
Checking:
10 + 20 = 30
30 = 30
✔