Expressions, formulae and equations

Constructing and solving equations

Name: ______________________________Date: ______________Score: ______ / 20

1.
Solve: x + 6 = 19
2.
Solve: 34 = y + 15
3.
I think of a number and add 6. The answer is 13. What was my number?
4.
To solve x + 8 = 16, what should you do to both sides?
1. Asubtract 8
2. Badd 8
3. Cdivide by 8
5.
x = 7 is the solution of x + 11 = 18.
True False
6.
Solve: x − 8 = 3
7.
Solve: 20 = y + 7
8.
I think of a number and subtract 3. The answer is 22. What was my number?
9.
To solve 8x = 32, what should you do to both sides?
1. Amultiply by 8
2. Bdivide by 8
3. Csubtract 8
10.
You pay £20 for 3 identical books and get £5 change. What does one book cost?
£
11.
Solve: x − 8 = 6
12.
Solve: 21 = y + 7
13.
I think of a number and subtract 2. The answer is 14. What was my number?
14.
To solve 2x = 6, what should you do to both sides?
1. Amultiply by 2
2. Bsubtract 2
3. Cdivide by 2
15.
Put the steps for solving x + 5 = 16 in order.
Write the order (the order of the working) in the boxes:
- ?x = 11
- ?x + 5 = 16
- ?x + 5 − 5 = 16 − 5
16.
Solve: 4x = 20
17.
Solve: 40 = 5y
18.
I think of a number and multiply it by 2. The answer is 18. What was my number?
19.
To solve 3x = 36, what should you do to both sides?
1. Adivide by 3
2. Bmultiply by 3
3. Csubtract 3
20.
Put the steps for solving x + 4 = 7 in order.
Write the order (the order of the working) in the boxes:
- ?x = 3
- ?x + 4 = 7
- ?x + 4 − 4 = 7 − 4

Answer key

Expressions, formulae and equations — Constructing and solving equations