Question

tính gtrij của x biết (x-1)x-x(x-3)=-48

Answer 1

\(\left(x-1\right)\cdot x-x\cdot\left(x-3\right)=48\)

\(< ->x^2-x-x^2+3\cdot x=48\)

\(< ->2x=48\)

\(->x=24\)

Answer 2

,<=> (x-1-x+3)x=48

<=> 2x=48

<=> x=24

Answer 3

\(\left(x-1\right).x-x.\left(x-3\right)=48\)

\(\Leftrightarrow x^2-x-x^2+3.x=48\)

\(\Leftrightarrow2x=48\)

\(\Leftrightarrow x=48:2\)

\(\Leftrightarrow x=24\)