Răspuns:
8.
6+228-69-(88-5x):3=52
165-(88-5x):3=52
(88-5x):3=113
88-5x=339
-5x=251 =>x=(-50,2)
9.
180:a+460-25=94
180:a=94-435
180:a=(-341)
a=(-180/341)
10.
22500-(3a+100)•19=3500
(3a+100)•19=19000
3a+100=1000
3a=900
a=300
11.
42-20:[4-4:(8-3a)]+56=88
20:[4-4:(8-3a)+56]=(-10)
20:[60-4:(8-3a)]=(-10)
60-4:(8-3a)=(-2)
4:(8-3a)=62
8-3a=2:31
8-3a= Nu mai continui, nu pot să rezolv ceva scris greșit...
12.
(3a+8):4-4=4
(3a+8):4=8
3a+8=32
3a=24
a=8
13.
24:12+(15a-70)•20=402
(15a-70)•20=390
15a-70=18,5
15a=88,5
a=88,5:15=15,7:3=5,2(3)
14.
10000:[100-(100-2a)]+1=10
10000:(100-100+2a)=9
10000:2a=9
a=10000/18=5000/9=555,(5)
Dar, nu sunt corect scrise!
