Question

Giải các phương trình sau:

a. 3x+1=7x−113x+1=7x−11

b. 5−3x=6x+7

 

Answer 1

a. 3x+1=7x−113x+1=7x−11

⇔3x−7x=−11−1⇔−4x=−12⇔x=3⇔3x−7x=−11−1⇔−4x=−12⇔x=3

b. 5−3x=6x+75−3x=6x+7

⇔5−7=6x+3x⇔−2=9x⇔x=−\(\frac{2}{9}\)

Answer 2

Pain lam cau a thoi nhin no la la :))

\(3x+1=7x-113x+1=7x-11.\)

\(3x+1=7x-113x+1-7x+11=0\)

\(3x+1=0\Leftrightarrow x=-\frac{1}{3}\)