Question

Which TWO equations have ONE solutions?
1. 2x+3=2x+7
2. 7x+3=7x+3
3. 4x+22=8x+10
4. 5x+5=5x+4
5. 3x+18=5x+8
6. 3(4x+8)=4(3x+6)

Answer 1

1. 2x+3=2x+7
2. 7x+3=7x+3