3,5x:0,7+4,5x:9-2,8x:0,7

Question

3,5x:0,7+4,5x:9-2,8x:0,7

Answer 1

= 9 * 3,5х + 0,7 * 4,5х - 9 * 2,8х = 31,5х + 3,15х - 25,2х = 9,45х

Answer 2

5x+4.5/9*x-2.8x/0.7
5x+1/2*x-2.8/0.7
11/2*x-4x
11-2*4/2*x
ответ: 3/2*x