15 . ( x - 2 ) = ( 27 + 3 ) : 10
15 . ( x - 2 ) = 30 : 10
15 . ( x - 2 ) = 3
( x - 2 ) = 3 : 15
( x - 2 ) = 1/5
x = 1/5 + 2
x = 11/5
=> 15x-30=30:10=3
=> 15x=3+30=33
=>x=33/15=11/5
t i c k cho mình nha
15. ( x - 2 ) = ( 27 + 3 ) : 10
15 (x -2) = 30 : 10 =3
x-2 = 3 : 15 = \(\frac{1}{5}\)
x= \(\frac{1}{5}+2=\frac{1}{5}+\frac{10}{5}=\frac{11}{5}\)
\(15\cdot\left(x-2\right)=\left(27+3\right):10\)
\(15\cdot\left(x-2\right)=30:10=3\)
\(\Rightarrow x-2=3:15\)
\(\Rightarrow x=\frac{1}{5}+2\)
\(\Rightarrow x=\frac{11}{5}=2,2\)
Ủng hộ mk nhơ!!!^_^^_^^_^
15.(x-2)=(27+3):10
=15.(x-2)=30:10
=15.(x-2)=3
=x-2=15:3
=x-2=5
x=7
15.(x-2)=(27+3):10
=15.(x-2)=30:10
=15.(x-2)=3
=x-2=15:3
=x-2=5
x=7