Question

√2x-7=1
я хто вообще?​

Answer 1

$\sqrt{2x - 7} = 1 \\ ( \sqrt{2x - 7} ) {}^{2} = 1 {}^{2} \\ 2x - 7 = 1 \\ 2x = 8 \\ x = 4 \\ - - - - - - - - - \\ \sqrt{2 \times 4 - 7} = 1 \\ \sqrt{8 - 7} = 1 \\ \sqrt{1} = 1 \\ 1 = 1$