Question

Aflati numarul rational x pentru care :
x-3/5=2/7

7/3-x=1/5

x+3/4=1

2/5+x=2

Answer 1

x-3/5=2/7
x=2/7+3/5
x=10/35+21/35
x=31/35

7/3-x=1/5
x=7/3-1/5
x=35/15-3/15
x=32/15

x+3/4=1
x=1-3/4
x=4/4-3/4
x=1/4

2/5+x=2
x=2-3/5
x=10/5-3/5
x=7/5