Question

Cho \(A=\left|2x-1\right|-\left(x-5\right)\)

a)Rút gọn A

b)Tìm x để A=4

Answer 1

\(A=\left|2x-1\right|-\left(x-5\right)\)

\(=2x-1-x+5\)

\(=x+4\)

Để \(A=4\)

\(\Leftrightarrow x+4=4\)

\(\Rightarrow x=0\)

Answer 2

\(A=|2x-1|-\left(x-5\right)\)

=2x-1-x+5

=x+4

Để a = 4

=>x+4=4

<=>x=4-4=0

Vậy....