| x | +3=5 | y | -2=1 | 2x | +3=9 | 5y | -4=6 3/7 + | 4x |= 1 4 + | 3y |= 7

Question

| x | +3=5
| y | -2=1
| 2x | +3=9
| 5y | -4=6
3/7 + | 4x |= 1
4 + | 3y |= 7

Answer 1

1) +-2 
2)+-3
3)+-3
4)+-2
5)+-1/7
6)+-1