Question

помогите решить, пожалуйста (фото)

Answer 1

$sqrt{ frac{6}{4x-54} } = frac{1}{7}$

$frac{6}{4x-54} } = frac{1}{49}$

$6*49 = 4x-54$

$4x = 384$

$x = 87$

Answer 2

$sqrt{ frac{6}{4x-54} } = frac{1}{7} \ frac{6}{4x-54} = frac{1}{49} \ frac{6}{4x-54} - frac{1}{49} =0 \ frac{6*49-(4x-54)}{49(4x-54)} =0 \ frac{294-4x+54}{49(4x-54)} =0 \ frac{348-4x}{49(4x-54)} =0 \ left { {{348-4x=0} atop {4x-54 neq 0}} right. \ left { {{4x=348} atop {4x neq 54}} right. \ left { {{x=87} atop {x=13.5}} right.$
Ответ: х=87