0.77*4/9-4/9*2.83=(0.77-2.83)*4/9=-2.06*4/9=-2 6/10* 4/9=-26/10*4/9=-52/45=-1 7/45
<span>Решите уравнение
0,39:x-0,1=0,16
</span>0,39:x = 0,1+0,16 = 0.26
0.39/0.26 =x
x =1.5
S=30*b
1)1.5S=30*b → 30/1.5=20см
2)S/3.2=30*b → 30*3.2=96см
B - 8 = 54 x - 36 = 40 k + 14 = 20
b = 54 + 8 x = 40 + 36 k = 20 - 14
b = 62 x = 76 k = 6
62 - 8 = 54 76 - 36 = 40 6 + 14 = 20
54=54 40 = 40 20 = 20
1.5+3>7 2.13-3<11 3.7+3>9 4.15-5<14