Question

1、已知z=3x+2,a=4-x,当x取何值时,z比a的值小4

Answer 1

1. a-z=4-x-3x-2=4 -2-4x=0 x=-1/2

2. 4x-2m=3x-1 x=2m-1

x=2x-3m x=3m

2m-1=2*(3m)

m=-1/4