Question

корень12+х =корень7х+8 -2

Answer 1

корень12+х =корень7х+8 -2

12+х=7х+8-2

12+2-8=7х-х

6=6х

х=1

Ответ: х=1.

Answer 2

$sqrt{12+x} =sqrt{7x+8 -2}\(sqrt{12+x} )^2=(sqrt{7x+8 -2})^2\12+x=7x+8-2\6x=6\x=1$