Year 7 Equation Word Problems Worksheet — Level 3 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 7 linear equations worksheet.
Year 7 Equation Word Problems Worksheet — Level 3 — Practice Set 2 — Answers
For each problem, choose a letter for the unknown, write an equation, solve it, and check your answer in the words of the problem.
1.A rectangle is 5 cm longer than it is wide. Its perimeter is 30 cm. Find its width and length.
Answer: width 5 cm, length 10 cm
- 2(w + w + 5) = 30
- 4w + 10 = 30
- w = 5, so length = 10
2.Archie buys some notebooks at $3.50 each and pays $8.00 for delivery. The total is $29.00. How many notebooks did Archie buy?
Answer: 6
- 3.50n + 8.00 = 29.00
- 3.50n = 21.00
- n = 6
3.Oliver buys some notebooks at $4.50 each and pays $7.00 for delivery. The total is $16.00. How many notebooks did Oliver buy?
Answer: 2
- 4.50n + 7.00 = 16.00
- 4.50n = 9.00
- n = 2
4.Amelia buys some notebooks at $4.00 each and pays $7.00 for delivery. The total is $27.00. How many notebooks did Amelia buy?
Answer: 5
- 4.00n + 7.00 = 27.00
- 4.00n = 20.00
- n = 5
5.Amelia buys some notebooks at $1.50 each and pays $5.00 for delivery. The total is $11.00. How many notebooks did Amelia buy?
Answer: 4
- 1.50n + 5.00 = 11.00
- 1.50n = 6.00
- n = 4
6.A rectangle is 8 cm longer than it is wide. Its perimeter is 84 cm. Find its width and length.
Answer: width 17 cm, length 25 cm
- 2(w + w + 8) = 84
- 4w + 16 = 84
- w = 17, so length = 25
7.A rectangle is 1 cm longer than it is wide. Its perimeter is 82 cm. Find its width and length.
Answer: width 20 cm, length 21 cm
- 2(w + w + 1) = 82
- 4w + 2 = 82
- w = 20, so length = 21
8.The sum of 4 consecutive whole numbers is 190. Find the numbers.
Answer: 46, 47, 48, 49
- n + (n + 1) + (n + 2) + (n + 3) = 190
- 4n + 6 = 190
- n = 46
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.