УРАВНЕНИЯ x/(52+48)=2 (200+y)*3+500=1400 (y+50)*2=400-100 (3500-x)/2=1000 (x+5)*2=400-100 x+5=(400-10)/2
X+5=(400-10)/2 х+5=390/2 х+5=195 х=195-5 х=190 (3500-х):2=1000 3500-х=2000 х=3500-2000 х=1500