Question

x:0,25-x*1/2=70%

 

Answer 1

x.4-x.0,5=\(\frac{7}{10}\)

x.(4-0,5)=\(\frac{7}{10}\)

   x.3,5=\(\frac{7}{10}\)

        x=\(\frac{7}{10}\):3,5

        x=\(\frac{1}{5}\)

Answer 2

x:0,25-x*1/2=70%

=>x*0,4-x*0,5=7/10

=>x*(0,4-0,5)=7/10

=>x*(-0,1)=7/10

=>x=7/10:(-0,1)

=>x=-7

Answer 3

x:0,25-x*1/2=70%

=>x*0,4-x*0,5=7/10

=>x*(0,4-0,5)=7/10

=>x*(-0,1)=7/10

=>x=7/10:(-0,1)

=>x=-7

Answer 4

x:0,25-x*1/2=70%

=>x*0,4-x*0,5=7/10

=>x*(0,4-0,5)=7/10

=>x*(-0,1)=7/10

=>x=7/10:(-0,1)

=>x=-7