<span>х*4=480/2
4x=240
x=240\4
x= 60
</span>
7 5/13x-5/13=7 10/13
7 5/13x=5/13+7 10/13
7 5/13x=8 2/13
x=106/13*13/96
x=1 5/48
Ответ:
Пошаговое объяснение:
13/15z-(7/9+1/3z)=7 2/9
13/15z - 7/9 - 1/3z = 7 2/9
8/15z - 7/9 = 7 2/9
8/15z = 7 2/9 + 7/9
8/15z = 8
z = 8 * 15/8
z = 15