9*5-36:4=9*5=45 36:4=9 45-9=36
47+(51-19):4=51-19=32 32:4=8 47+8=55
(37+8):5=37+8=45:5=9
60:(47-37)*5=47-37=10 60:10=6 6*5=30
1) AOC= AOB + BOC = 45+15= 60
2) AOB= AOC - BOC = 95 -29 = 66
<span>3) BOC= AOC - AOB = 120 - 84 =36
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An=a10=a1+9*d=-2+9*3=-2+27=25
S10=0,5(а1+а10)*n=0,5*(-2+25)*10=0,5*23*10=115