Question

[thuy thai]

 Tìm x∈Z ,biết

3 ( x -2 ) + 4(x-5)= 23

Answer 1

[Minh Nhân]

\(3\left(x-2\right)+4\left(x-5\right)=23\)

\(\Rightarrow3x-6+4x-20-23=0\)

\(\Rightarrow7x-49=0\)

\(\Rightarrow x=7\)

Answer 2

[gãi hộ cái đít]

    3(x-2)+4(x-5)=23

<=>3x-6+4x-20=23

<=>7x-26=23

<=>7x=49

<=>x=7

Vậy x=7