1)
2/3
1 5/7
17 1/2
2)
x*8/9 + x = 1020
17/9 * x = 1020
x = 1020 * 9/17 = 540
1020 - 540 = 480
ответы 540 и 480
3) 5/9 * х = 15
x = 15*9/5 = 3*9 = 27
4) o*2/14 + o*3/14 = 14
o*5/14=14
o = 14*14/5 = 196/5 = 39 1/5
5)
7a/7b - 3b/7b
(7a-3b)/7b
1)
2/3
1 5/7
17 1/2
2)
x*8/9 + x = 1020
17/9 * x = 1020
x = 1020 * 9/17 = 540
1020 - 540 = 480
ответы 540 и 480
3) 5/9 * х = 15
x = 15*9/5 = 3*9 = 27
4) o*2/14 + o*3/14 = 14
o*5/14=14
o = 14*14/5 = 196/5 = 39 1/5
5)
7a/7b - 3b/7b
(7a-3b)/7b