Question

-7-x+12=-13+7

Answer 1

-7-x+12= -13+7

\(\Rightarrow\)-x + 5 = -6

\(\Rightarrow\)-x = -11

\(\Rightarrow\) x = 11

Answer 2

\(-7-x+12=-13+7\)

\(\Rightarrow-7-x+12=-6\)

\(\Rightarrow-x=-6+7-12\)

\(\Rightarrow-x=-11\)

\(\Rightarrow x=11\)

Vậy.............

Answer 3

<=>-7-x+12=-13+7

<=>-7-x+12=-6

<=>-7-x =-18

<=> x =11

Vậy x=11