1) 5,7 - y = 7y = 5,7 - 7y = -1,3
2) x + 3,1 = (8,75 7) / (5/7 3/5 2/3)x + 3,1 = 8,75 7 7 5 3 / 5 7 5 2 * 3x + 3,1 = 306,25 / 15x + 3,1 = 20,416666666...
x = 20,416666666... - 3,1x = 17,316666666...
3) (4/15) / (2/5) + 1/3 = (4/15) * (5/2) + 1/3(4/15) / (2/5) + 1/3 = 20/30 + 1/3(4/15) / (2/5) + 1/3 = 2/3 + 1/3(4/15) / (2/5) + 1/3 = 1
Ответ: 1) y = -1,32) x = 17,316666666...3) 1
1) 5,7 - y = 7
y = 5,7 - 7
y = -1,3
2) x + 3,1 = (8,75 7) / (5/7 3/5 2/3)
x + 3,1 = 8,75 7 7 5 3 / 5 7 5 2 * 3
x + 3,1 = 306,25 / 15
x + 3,1 = 20,416666666...
x = 20,416666666... - 3,1
x = 17,316666666...
3) (4/15) / (2/5) + 1/3 = (4/15) * (5/2) + 1/3
(4/15) / (2/5) + 1/3 = 20/30 + 1/3
(4/15) / (2/5) + 1/3 = 2/3 + 1/3
(4/15) / (2/5) + 1/3 = 1
Ответ: 1) y = -1,3
2) x = 17,316666666...
3) 1