Răspuns:
(a+9:3)x5=45-5
(a+3)x5=40
(a+3)=40:5
(a+3)=8
a=8-3
a=5
a-(42:6)=50x2
a-7=100
a= 100+7
a=107
21 900-(a+5760)=7860
21 900-a=7 860+5 760
21 900-a=13 620
a=21 900-13 620
a=8 280
a x[(130:5+72:2-13):(735:5-140)]=238
a x[(26+36-13):(147-140)]=238
a x(49:7)=238
ax7=238
a=34
a:5=5+[5-(5x1-5:5+1)X1]
a :=5+[5-(5-1+1)X1]
a:5=5+(5-5x1)
a:5=5+0
a:5=5
a= 5x5
a=25
a+149+(72:8+28:4):4=396
a+149+(9+7):4=396
a+149+16:4=396
a+149+4=396
a+153=396
a=396-153
a=243
[1 250:10-(46+14xb)]X3=195
[125-(46+14xb)]X3=195
[125-(46+14xb)]=195:3
[125-(46+14xb)]=65
(46+14xb)=125-65
(46+14xb)=60
14xb=60-46
14xb=14
b=14:14
b=1
