Respuesta :

solve for x.

sx+tx=r

Factor out variable x.

x(s+t)=r

Divide both sides by s+t.

[tex]\sf \dfrac{x(s+t)}{s + t} = \dfrac{r}{s + t} \\ \\ \\ \huge{\boxed{x =\dfrac{r}{s + t}}}[/tex]

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