Question

7/12х-0,5=1,25 2,7+2/9у=4,3
решите уравнения пожалуйста

Answer 1

$1)~~ dfrac{7}{12}x-0,5=1,25;~~~~dfrac{7}{12}x=1,75;\ \ \~~~~ dfrac{7}{12}x=dfrac{175}{100};~~~~dfrac{7}{12}x=dfrac{7}{4};~~~~ x=dfrac{7}{4}cdot dfrac{12}{7};\ \ boxed{boldsymbol{x=3}}\ \ \ 2)~~2,7+dfrac{2}{9}y=4,3; dfrac{2}{9}y=1,6; dfrac{2}{9}y=dfrac{16}{10};\ \ \~~~~dfrac{2}{9}y=dfrac{8}{5}; y=dfrac{8}{5}cdot dfrac{9}{2}; y=dfrac{72}{10}; \ \ boxed{boldsymbol{y=7dfrac{2}{10}=7,2}}$