Question

Tìm x biết,
x+1,5=2.x/3

Answer 1

\(x+1,5=2\cdot\frac{x}{3}\)

\(x+1,5=\frac{2x}{3}\)

\(x=\frac{2x}{3}-\frac{3}{2}\)

\(x=\frac{4x}{6}-\frac{9}{6}\)

\(x=\frac{4x-9}{6}\)

\(x\cdot6=4x-9\)

\(4x-6x=9\)

\(-2x=9\Rightarrow x=-\frac{9}{2}\)

Answer 2

\(x+1,5=\frac{2.x}{3}\)

\(\Leftrightarrow x-\frac{2x}{3}=-\frac{3}{2}\)

\(\Leftrightarrow\frac{3x}{3}-\frac{2x}{3}=-\frac{3}{2}\)

\(\Leftrightarrow\frac{3x-2x}{3}=-\frac{3}{2}\)

\(\Leftrightarrow\frac{x}{3}=-\frac{3}{2}\)

<=> 2x=-9

<=> x=-9/2

<=> x=-4,5