Question

Rezolvati ecuatiile:
a)x:0,2-3,7=1,1
b)x supra 2=-5+7 supra 3
c)2x-0,22=0,28
d)4 supra 3 :x= 5 supra 3 -1,(3)

Answer 1

a)x÷0.2-3,7=1,1
  x÷0,2=1.1+3,7
  x÷0,2=4,8
  x=4,8*0,2
  x=0,96

b)$\frac{x}{2} = \frac{-5+7}{3}$
   $\frac{x}{2} = \frac{2}{3}$
$x= \frac{2*2}{3= \frac{4}{3} }$

c)2x-0,22=0.28
   2x=0,28+0,22
   2x=0,50
    x=0.50/2
    x=0,25

d)$\frac{4}{3/x} = \frac{5}{3- 1\frac{3}{9} }$
$3- 1\frac{3}{9} } = \frac{3}{1} - \frac{12}{9} = \frac{27-12}{9} = \frac{15}{9}$
3÷x=$\frac{4* \frac{15}{9} }{5} = \frac{ \frac{60}{9} }{5} = \frac{12}{9}$
3÷x=$\frac{12}{9}$
3÷(-$\frac{12}{9}$)=x
-$\frac{3}{1} / \frac{12}{9} = -\frac{3}{1} * \frac{9}{12} = -\frac{1}{1} * \frac{9}{4} =- \frac{9}{4}$
x=-$\frac{9}{4}$