Question

tìm x:

(x-70);2-20=-5

Answer 1

=>(x-70):2=15

=>x-70=30

hay x=100

Answer 2

\((x-70):2-20=-5\)

\((x-70):2=-5+20\)

\((x-70):2= 15\)

\(x-70= 15.2\)

\(x-70=30\)

\(x=30+70=100\)

Answer 3

\(\left(x-70\right):2-20=-5\)

\(\left(x-70\right):2=-5+20\)

\(\left(x-70\right):2=15\)

\(x-70=15\times2\)

\(x-70=30\)

\(x=30+70\)

\(x=100\)

Answer 4

(x-70);2-20=-5

(x-70):2     = -5 + 20

(x-70):2     = 15

(x-70)        = 15 . 2

(x-70)        = 30

 x               = 30 + 70

 x               = 100