Question

Bài 1: Tìm x

a) x - (-37) = 30

b) lxl = 5

c) lxl < 3

d) lx - 2l = 6

Answer 1

a) x - (-37) = 30

\(\Rightarrow x+37=30\)

\(\Rightarrow x=-7\)

b)|x|=5

\(\Rightarrow x=\pm5\)

c)|x|<3

\(\Rightarrow x< \pm3\)

d)|x-2|=6

\(\Rightarrow\left|x-2\right|=\pm6\)

Xét x-2=6 =>x=8Xét x-2=-6 =>x=-4

Answer 2

a) x-(-37)=30

,=>x+37=30

=>x=30-37

x=-7

Answer 3

b) IxI=5

=>x=5 hoặc x=-5

 

Answer 4

dương taurus (taurus=trâu)

=>dương trâu ^^ đồng nghĩa hay