Question

determinati nr x din 1/2=x+3/10 va rog ajutati-ma

Answer 1

Răspuns:

$x=\frac{1}{5}$

Explicație pas cu pas:

$\frac{1}{2} = x+\frac{3}{10}\\ \frac{1}{2}-x= \frac{3}{10}\\-x=\frac{3}{10}-\frac{1}{2}\\-x=\frac{3}{10}-\frac{1}{2}*5\\ -x=\frac{3}{10}-\frac{5}{10}\\ -x=\frac{-2}{10} \\x=\frac{1}{5}$

Ai scris gresit enuntul, deci voi adauga si rezolvarea conform enuntului corect:

$\frac{1}{2}=\frac{x+3}{10}\\2(x+3)=1*10\\2x+6=10\\2x=10-6\\2x=4\\x=\frac{4}{2}\\ x=2.$