e
2005.(x-2006)=2005 x-2006=2005:2005=x-2006=1 x=1+2006 x=2007
g[(x+50).50-50]:50=50 [(x+50).50-50]=50.50=2500 (x+50).50=2500+50=2550 (x+50)=2550:50=51 x=51-50 x=1
e) <=> 2005x -4022030 =2005
<=> 2005x = 4024035
=> x = 4024035 /2005 = 2007
e) (x-2006) = 2005:2005=1
x=1+2006=2006
g) (x+50)*50-50=2500
(x+50)*50=2550
x+50=51
x=1
mk ko ghi đề nha chúc bn học tốt