4,a) 17,8-(14,904:3.x-1,084)-2,63=13,77
17,8-4,968.x-1,084=16,4
17,8-4,968.x=17,484
4,968.x=0,316
x=0.06360708535
b)x:0,25+x.11=36
x.4+x.11=36
x.15=36
x=2,4
c)x.16,01-x:100=76
x.16,01-x.1/100=76
x.15=76
x=76/15
d)3,75+1,25.x=19/4
1,25.x=1
x=0,8
e)32:(x:35)=5,6
32:x.35=5,6
32:x=0,16
x=200
g)43/8+x.3/2:65/4=1
x.3/2:65/4=- 35/8
x.3/2=- 2275/32
x=-... ( đây là cấp 2)
