а) b + 5 9\10 = 7 5\12
b=89\12-59\10
b=445\60-354\60
b=91\60
b=1 31\60
б) 3,85 x (d - 4,02) = 8,47
d-4.02=8.47:3.85
d-4.02=2.2
d=2.2+4.02
d=6.22
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Answers & Comments
а) b + 5 9\10 = 7 5\12
b=89\12-59\10
b=445\60-354\60
b=91\60
b=1 31\60
б) 3,85 x (d - 4,02) = 8,47
d-4.02=8.47:3.85
d-4.02=2.2
d=2.2+4.02
d=6.22
b=89\12 -59\10
b=445\60-354\60
b=91\60
b=131\60
б) 3,85×(d-402) =8,47
d-402=8.47÷3×85
d-4.02=2.2
d=2×2+4.02
d=6.22