Răspuns :
(285-81):102+(x+15-70)x20=402
204:102+(x+15-70)x20=402
2+(x+15-70)x20=402-2
(x+15-70)x20=400:20
x+15-70=20+70
x+15=90-15
x=75
Sper ca te-am ajutat!!!Succes
204:102+(x+15-70)x20=402
2+(x+15-70)x20=402-2
(x+15-70)x20=400:20
x+15-70=20+70
x+15=90-15
x=75
Sper ca te-am ajutat!!!Succes
204:102+(x-55)*(inmultit)20=402
2+20x-1100=402
20x=402+1100-2
20x=1500
=>x=75! :)
2+20x-1100=402
20x=402+1100-2
20x=1500
=>x=75! :)