Question

Answer 1

1)\(=>\dfrac{3}{4}x+\dfrac{1}{2}x+x=-\dfrac{11}{4}\)

\(=>x=-\dfrac{11}{4}:\left(\dfrac{3}{4}+\dfrac{1}{2}+1\right)\)

\(x=-\dfrac{11}{4}:\left(\dfrac{3}{4}+\dfrac{2}{4}+\dfrac{4}{4}\right)=-\dfrac{11}{4}\times\dfrac{4}{9}=-\dfrac{11}{9}\)

2)\(=>x\left(0,75-1+\dfrac{5}{4}\right)=20\%\)

\(x.1=20\%\)

\(x=20\%:1=0,2\)