Question

(1)2x—10.3x (2)3x—x—5x （3）－b＋0.6b－2.6b （4）m－n^2＋m－n^2

Answer 1

(1)2x—10.3x

=(2-10.3)x

=-8.3x

(2)3x—x—5x

=(3-1-5)x

=-3x

（3）－b＋0.6b－2.6b

=(-1+0.6-2.6)b

=-3b

（4）m－n^2＋m－n^2

=(m+m)-(n^2+n^2)

=2m-2n^2