Question

a.5+2x=3x+1

b.4-2x=5x+2

giúp mình với nha cái này mình chịu hoc nhung khong hieu ro lam,chi ho minh cach lam luon nha

Answer 1

a.5+2x=3x+1

\(\Leftrightarrow\)2x-3x=1-5

\(\Leftrightarrow\)-x=-4

\(\Leftrightarrow\)x=4

b.4-2x=5x+2

\(\Leftrightarrow\)-2x - 5x =2-4

\(\Leftrightarrow\)-7x=-2

\(\Leftrightarrow\)\(x=\dfrac{2}{7}\)

Answer 2

a, 5+2x=3x+1

-> 2x-3x=1-5

-> -1x=-4

-> x=4

-Vậy x=4

b,4-2x=5x+2

-> -2x - 5x = 2-4

-> -7x =-2

-> x= \(\dfrac{2}{7}\)

Vậy x=\(\dfrac{2}{7}\)