60+360 : x =100
60+360
--------- = 100
x
60+360=100x
420=100x
x=420 : 100
x=4,2
<span>-4,4/9:х=2,2/3:(-1,1/2)
-4,4/9*</span>(-1,1/2)=x*2,2/3
-40/9*(-3/2)=8/3*x
20/3=8/3*x
8/3*x=20/3
x=20/3:8/3
x=20/3*3/8
x=5/2=2,5 (или 2,1/5)
Ответ: x=2,5
180:9=20
20 x 6 =120
3020- 120=2900
5010- 2900 = 2110