Răspuns:
Explicație pas cu pas:
1) x+5/12=3/4 12x+5=9 12x=4 x=1/3
2)x-5/36=7/24 72x-10=21 72x=31 x=31/72
3) 11/26-x=10/39 33-78x=20 33-20=78x 13=78x x=1/6
4)x×7/5=4/3 x=7x3/5x4=21/20
