1,7(5x+3y)-2,4x-0,9 при x+y=2 3/4

1,7×(5x+3y)-2,4x-0,9        при:x+y=2 3/41,7× 8x+y- 2,4x-0,913,6x+y-2,4x-0,913,6y-2,4-0,911,2y-0,910,3y