Question

tim x biet -2x-40=(5-x)-(-15+60)

 

Answer 1

\(-2x-40=\left(5-x\right)-\left(-15+60\right)\)

\(-2x-40=5-x+15-60\)

\(-2x+x=5+15-60+40\)

\(-x=0\Rightarrow x=0\)

Answer 2

-2x-40=(5-x)-(-15+60)

<=>-2x-40=5-x+15-60

<=>-2x-40=5-x-45

<=>-2x-40-5+x+45=0

<=>80-x=0

<=>x=80

Vậy x=80

Answer 3

Trả lời:

\(-2x-40=\left(5-x\right)-\left(-15+60\right)\)

\(\Leftrightarrow-2x-40=5-x-45\)

\(\Leftrightarrow-2x-40=x-40\)

\(\Leftrightarrow-2x-x=40-40\)

\(\Leftrightarrow-3x=0\)

\(\Leftrightarrow x=0\)

Vậy\(x=0\)

Hok tốt!

Good girl