Question

21-3.(x-2)=18 cứu

Answer 1

3.(x-2)=3

x-2=1

x=3

Answer 2

\(21-3\left(x-2\right)=18\\ 3\left(x-2\right)=21-18\\ 3\left(x-2\right)=3\\ x-2=1\\ x=3\)

Answer 3

\(21-3.(x-2)=18 \)

\(3.(x-2)=21-18 \)

\(3.(x-2)=3\)

\(x-2=3:3\)

\(x-2=1\)

\(x=1+2\)

\(x=3\)

Answer 4

\(21-3\left(x-2\right)=18\\ 3\left(x-2\right)=21-18\\ 3\left(x-2\right)=3\\ x-2=3:3\\ x-2=1\\ x=1+2\\ x=3\)

Answer 5

 3.(x-2)=21-18

3.(x-2)=3

x-2=3:3

x-2=1

x=1+2 = 3 .

Answer 6

\(21-3.\left(x-2\right)=18\)

\(\Rightarrow3.\left(x-2\right)=21-18\)

\(\Rightarrow3.\left(x-2\right)=3\)

\(\Rightarrow x-2=3:3\)

\(\Rightarrow x-2=1\)

\(\Rightarrow x=2+1\)

\(\Rightarrow x=3.\)