MathClown007
New member
- Joined
- Aug 16, 2015
- Messages
- 8
x = -1
y = 7
Problem: y - 3 = 2 (x + 1)
1. 7 - 3 = 2x + 2
2. 4 = 2x + 2
3. 2 = 2x
4. 1=x
This is what I don't get: x = -1. Thus on the part titled "problem", should it cancel each other out? That is, (-1 + 1) should be 0. Where did the "2x" come from? And where did the "+ 2" come from? You have 2x + 2 but in the "problem" there is only ONE 2.
Thank you!
y = 7
Problem: y - 3 = 2 (x + 1)
1. 7 - 3 = 2x + 2
2. 4 = 2x + 2
3. 2 = 2x
4. 1=x
This is what I don't get: x = -1. Thus on the part titled "problem", should it cancel each other out? That is, (-1 + 1) should be 0. Where did the "2x" come from? And where did the "+ 2" come from? You have 2x + 2 but in the "problem" there is only ONE 2.
Thank you!