Question

Lg(2x-7)=-1 reshenie

Answer 1

$lg(2x-7)^{-1} =1$
$(2x-7) ^{-1} =10$
$frac{1}{2x-7}=10$
$10(2x-7)=1$
20x-70=1
20x=71
x=71/20
x=3.55