-17x+19y-15y+13x 0,9n-0,8-0,7m+3,5n-1,9n

Question

-17x+19y-15y+13x
0,9n-0,8-0,7m+3,5n-1,9n

Answer 1

-17х+19у-15у+13х= х(-17+13)+у(19-15) = -4х + 4у = 4(-х+у) = 4(у-х)
0.9n-0.8-0.7m+3.5n-1.9n = n(0.9+3.5-1.9) -0.8-0.7m = 2.5n-0.8-0.7m

Answer 2

-4x+4y
2.5n-0.7m-0.8.