Question

2x-3+(-7)=x-5-12

Answer 1

2x-3+(-7)=x-5-12

=>2x-3-7=x-(5+12)

=>2x-(3+7)=x-17

=>2x-10=x-17

=>2x-10-x+17=0

=>2x-x-10+17=0

=>x+7=0

=>x=-7

Answer 2

Ta có: 2x-3-7=x-5-12

<=>2x-10=x-17

<=>2x-x=-17+10

<=>x=-7

Vậy pt có tập nghiệm x=-7

Answer 3

\(2x-3+\left(-7\right)=x-5-12\)

\(2x-x=3+7-5-12\)

\(x=-7\)