4529 2437
18 54
36232 9748
4529 12185
40.761 21933
8372 3945
62 94
16744 15780
50232 35505
66976 51285
-10(-4х-10-24) = 300
40х+100+240 = 300
40х =300-100-240
40х = -40
х = -1
Ответ: -1.
6 4/15+3 5/9 =6 12/45 + 3 25/45 =9 37/45 см - вторая сторона.
6 4/15 + 9 37/45 = 6 12/45 + 9 37/45 = 15 49/45 = 16 4/45 см - сумма длин первой и второй стороны.
40 - 16 4/45 = 23 41/45 см - третья сторона.
<span>1)1/2+1/3(13/4+5/6*1/8)=
5/6 * 1/8 = 5/48
13/4 + 5/48 = 156/48 + 5/48 = 161/48
1/3 * 161/48 = 161/44
1/2 + 161/144 = 72/144 +161/144 = 233/144 = 1 89/144
</span><span>2)5/3*4/6+(8/6-5/3)=
</span><span>8/6 -5/3 = 8/6 -10/6 = - 2/6
5/3 * 4/6 = 20/18 = 10/9
10/9 + ( - 2/6) = 20/18 -6/18 = 14/18 = 7/9
</span><span>3)2/4-1/2(3/8+6/7*1/5= решаю как если скобка после 1/5
</span><span>6/7 * 1/5 = 6/35
3/8 +6/35 = 105/280 +48/280 = 153/280
1/2 * 153/280 = 153/560
2/4 - 153/560 = 280/560 -153/560 = 127/560
</span>