(1142600-890778):74+309×708=
1)1142600-890778=251822
2)251822:74=3403
3)309×708=218772
1)304752/21=14512
2)1117*17=18989
3)59937-14512=45425
4)45425-18989=26436
5)26436/12=2203
..............................
X/4+y/8=2
x/4+y/8=8
2x+y=64
2x=64-y
x=32-y/2
2x/9+y/6=1
2x/9+y/6=1
4x+3y=18
4x=18-3y
x=9/2-3/4y
x=9/2-3/4y