Question

Допоможіть буль ласка

Answer 1

$\frac{x+7}{x-2} =10$

$\frac{x+7}{x-2} -10=0$

$\frac{x+7-10(x-2)}{x-2}=0$

$\frac{x+7-10x+20}{x-2}=0$

$\frac{27-9x}{x-2}=0=>\left \{ {{27-9x=0} \atop {x-2\neq 0}} \right. =>\left \{ {{-9x=-27} \atop {x\neq 2}} \right. =>\left \{ {{x=-27:(-9)} \atop {x\neq 2}} \right.=>\left \{ {{x=3} \atop {x\neq 2}} \right. =>x=3$

      $x=3$

Ответ: {3}