2/5 + 3/5 = 5/5 = 1
1/5 + 3/5 = 4/5
4/7 + 2/7 = 6/7
1/7 + 4/7 = 5/7
1) -40+8x>10
8x>50
x>6.25
x∈(6.25;+∞)
2) 14+7x≤-7
7x≤-21
x≤-3
x∈(-∞;-3]
Ответ:
Пошаговое объяснение:
5/6+7/12=(15+7)/18=22/18=11/9=1 2/9;
3/4+1/6=(9+2)/12=11/12;
1/12+5/4=(1+15)/12=16/12=4/3=1 1/3.
3/8+5/32=(12+5)/32=17/32.
7 - 6x = x^2, x =/= 0
x^2 + 6x - 7 = 0
x1 = 1
<span>x2= -7 </span>