(Х+58)-37=91 69-(у-28)=13 Х+58=91+37 у-28=69-13 Х+58=128 у-28=56 Х=128-58 у=55+28 Х=70 у=83 (70+58)-37=91 69-(83-28)=13 91=91 13=13 321+(х+13)=450 204-(х+29)=100 Х+13=450-321 х+29=204-100 Х+13=129 х+29=104 Х=129-13 х=104-29 Х=116 х=75 321+(116+13)=450 204-(75+29)=100 450=450 100=100 (Х-23)×14=56 205÷(у-27)=41 Х-23=56÷14 у-27=205÷41 Х-23=4 у-27=5 Х=4+23 у=5+27 Х=27 у=32 (27-23)×14=56 205÷(32-27)=41 56=56 41=41 89×(b+13)=7120 b+13=7120÷89 b+13=80 b=80-13 b=67 89×(67+13)=7120 7120=7120
Р=9000
i1=0.05
n(25.03)=83
n(31.03)=90
I1=P*i1*[n(25.03) - n(31.03)]/360
I1=9000*0.05*(90-83)/360 = 8.7
I2=0.05
n(04.09)=246
n(26.09)=269
I1=P*i1*[n(04.09) - n(26.09)]/360
I1=9000*0.05*(269-246)/360 = 28.7
I = I1+I2 = 8.7+28.7 = 37.4