Răspuns:
a)x=17231
b)x=134400
Explicație pas cu pas:
a) 50086-x-31120=1735
50086-x=1735+31120=32855
50086=32855+x
50086-32855=x, deci x=17231
b) 159900-11750-x=4580+15060-5890
159900-x=4580+15060-5890+11750=25500
159900=25500+x
159900-25500=x, deci x=134400