<span>1 1/22 *3 2/3 -(2 5/6+3 5/6*7/23)*3/5 = 1 13/30
1) 3 5/6 * 7/23 = 23/6 * 7/23 = 7/6
2) 2 5/6 + 7/6 = 17/6 + 7/6 = 24/6 = 4
3) 1 1/22 * 3 2/3 = 23/22 * 11/3 = 23/2 * 1/3 = 23/6
4) 4 * 3/5 = 12/5
5) 23/6 - 12/5 = 115/30 - 72/30 = 43/30 = 1 13/30</span>
<span>-7x+4x-8x=-9,9
-11x = -9,9
x = 9,9 : 11
x = 0,9
1/8x-2/3x+1/2x=-5/18
3/24x - 16/24x + 12/24x = -5/18
-1/24x = -5/18
x = 5/18 * 24
x = 6 2/3</span>