Question

solutia ecuatiei 4 ori 1 pe 5 + 2 pr 3 ori x =6 ori 13 pe 15 este ? a.4 ; b.1 pe 4 ; c. 3 pe 4 ?

Answer 1

$4\cdot\dfrac{1}{5}+\dfrac{2}{3}\cdotx=6\cdot\dfrac{13}{15}~~~\Rightarrow simplifici~6~si~15~cu~3$
$\dfrac{4}{5}+\dfrac{2}{3}x=2\cdot\dfrac{13}{5}$
$\dfrac{4}{5}+\dfrac{2}{4}x=\dfrac{26}{5}~~~\Rightarrow amlplifici~pentru~a~ajunge~la~acelasi~numitor~care~este~15$
$12+10x=78$
$10x=78-12$
$10x=66$
$x=\dfrac{66}{10}~~~simplifici~66~si~10~cu~2$
$x=\dfrac{33}{5}~~~~~~~~~~\big{(}x=33:5=6,6\big{)}$