Question

2+x-13=7-9

Answer 1

\(2+x-13=7-9\)

\(\Rightarrow2+x-13=-2\)

\(\Rightarrow x=-2-2+13\)

\(\Rightarrow x=9\)

Vậy.........

Answer 2

2+x-13=7-9

2+x=-2+13

2+x=11

x=11-2

x=9

Answer 3

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Answer 4

<=>2+x-13=-2

<=>2+x=11

<=>x=9

Vậy x=9