19/4=4(ост 3)
60/7=8(ост 4)
7дм=70см 70+2=72см-другая сторона S=70*72=5040см P=70+70+72+72=284
<span>а) 11-3/2x+1/=5 ==> -3<span>/2x+1/=5-11=-6 ==> <span> /2x+1/=-6/-3=2 ==></span></span></span>
<span><span><span> ==> 1) 2x+1=2 ==> x=1/2</span></span></span>
<span><span><span> 2) 2x+1=-2 ==> x=-3/2</span></span></span>
<span><span><span><span>б) 17-4/3x-1/=9 ==> <span>-4/3x-1/=9-17=-8 ==> <span>/3x-1/=-8/-4=2 ==></span></span></span></span></span></span>
==> 1) 3x-1=2 ==> x=1
2) 3x-1=-2 ==> x=-1/3
896/7
-7 128
19
-14
56
-56
0
ответ 128
1) 7 целых 1/2 × 9 = 7 целых 9/18
4 целых 2/3 × 6 = 4 целых 12/18
5 целых 1/6 × 3 = 5 целых 3/18
3 целых 4/9 × 2 = 3 целых 8/18
2) 9 целых 1/2 × 6 = 9 целых 6/12
5 целых 1/3 × 4 = 5 целых 4/12
6 целых 3/4 × 3 = 6 целых 9/12
8 целых 5/6 × 2 = 8 целых 10/12