54÷6=9 (p) blaknot
54-9=45 (p) doroźe kniga cem blaknot
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Y:60=b:12
y:b=60:12
y:b=5
y=60:5
y=12
b=12:12
b=1
12:60=1:12
1) 11Y = 20 --> Y = 20 : 11 = 1.818 (округляем до 1.8)
2) 7 * 24 = 12 * (8X + 15)
168 = 96X + 180
96X = 168 - 180
96X = ( - 12)
X = ( - 12\96) = ( - 0.125)