(3 3/4-2,8):19+(5 4/9+1/3):2 1/6= 2 2/3
1)3 3/4-2,8=3,75-2,8=0,95
2)0,95÷19=0,05
3)5 4/9 + 1/3=5 4/9+3/9=5 7/9
4)5 7/9÷2 1/6=
52/9÷13/6=52/9*6/13=8/3=2 2/3
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2) 3 2/5(9х+0,8) 15,12=24,27
3,4*(9х+0,8) * 15,12=24,27
(3,4*9х+3,4*0,8)*15,12=24,27
(30,6х+2,72)*15,12=24,27
30,6х*15,12+2,72*15,12=24,27
462,672х+41,1164=24,27
462,672х=24,27-41,1164
462,672х= - 16,8464
х= (-16,8464)÷462,672
х= - 0,036