Year 10 Equation Word Problems Worksheet — Level 3 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 10 linear equations worksheet.
Year 10 Equation Word Problems Worksheet — Level 3 — Practice Set 3 — 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 3 cm longer than it is wide. Its perimeter is 18 cm. Find its width and length.
Answer: width 3 cm, length 6 cm
- 2(w + w + 3) = 18
- 4w + 6 = 18
- w = 3, so length = 6
2.The sum of 4 consecutive whole numbers is 66. Find the numbers.
Answer: 15, 16, 17, 18
- n + (n + 1) + (n + 2) + (n + 3) = 66
- 4n + 6 = 66
- n = 15
3.A rectangle is 3 cm longer than it is wide. Its perimeter is 42 cm. Find its width and length.
Answer: width 9 cm, length 12 cm
- 2(w + w + 3) = 42
- 4w + 6 = 42
- w = 9, so length = 12
4.The sum of 4 consecutive whole numbers is 126. Find the numbers.
Answer: 30, 31, 32, 33
- n + (n + 1) + (n + 2) + (n + 3) = 126
- 4n + 6 = 126
- n = 30
5.A rectangle is 3 cm longer than it is wide. Its perimeter is 58 cm. Find its width and length.
Answer: width 13 cm, length 16 cm
- 2(w + w + 3) = 58
- 4w + 6 = 58
- w = 13, so length = 16
6.The sum of 3 consecutive whole numbers is 84. Find the numbers.
Answer: 27, 28, 29
- n + (n + 1) + (n + 2) = 84
- 3n + 3 = 84
- n = 27
7.The sum of 3 consecutive whole numbers is 96. Find the numbers.
Answer: 31, 32, 33
- n + (n + 1) + (n + 2) = 96
- 3n + 3 = 96
- n = 31
8.A rectangle is 4 cm longer than it is wide. Its perimeter is 80 cm. Find its width and length.
Answer: width 18 cm, length 22 cm
- 2(w + w + 4) = 80
- 4w + 8 = 80
- w = 18, so length = 22
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.
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