Mathematics - Pre-Algebra - Two-step equations - Guess My Number

'I think of a number, multiply it by 3, then add 5, and I get 20. What was my number?' Options: 4, 5, 6, 7. Work backwards: 20-5=15, 15÷3=5. Do 4 'guess my number' puzzles. The student reverses operations to find the answer. This IS solving a two-step equation (3x+5=20) in a fun context.

Edodovivmagarwal
Mathematics - Pre-Algebra - Two-step equations - Guess My Number
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Mathematics - Pre-Algebra - Two-step equations - Guess My Number

vivmagarwal
vivmagarwalJan 29, 2026

Description

'I think of a number, multiply it by 3, then add 5, and I get 20. What was my number?' Options: 4, 5, 6, 7. Work backwards: 20-5=15, 15÷3=5. Do 4 'guess my number' puzzles. The student reverses operations to find the answer. This IS solving a two-step equation (3x+5=20) in a fun context.

Details

MathematicsPre-AlgebraStage 7, Class 7, Class 7, MYP Grade 7, Grade 7

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17

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