( 3.44 : ( 0.711 - 0.311) +2 ) х = 190.8
( 3.44 : 0.4 + 2) х = 190.8
( 8.6 + 2) х = 190.8
10..6х = 190.8
х = 190.8 : 10.6
х = 18
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Answers & Comments
17,1:9=1.9
20,4:4=5.1
3,164:4=0.791
2.
P = 4a, a = P/4 = 116.2 / 4 = 29.05 см
3.
( 3.44 : ( 0.711 - 0.311) +2 ) х = 190.8
( 3.44 : 0.4 + 2) х = 190.8
( 8.6 + 2) х = 190.8
10..6х = 190.8
х = 190.8 : 10.6
х = 18