Lesson 21 Expressions and equations
Worksheet 2 Solving equations
Use the same ideas to solve these:
- 3x + 5 = 2x + 9 2. 5d – 6 = 3d + 12
Why is it okay to change:
3 (2p + 1) = 5p + 8. to 2p + 1 + 2p + 1 + 2p + 1 = 5p + 8?
How can thinking like this help to find the value of p?