Question

Tìm X : 

X : 0,5 + X x 0,5 = 0,75

jup mình nha . ai xong đầu tick 3 cái 

Answer 1

\(x:0,5+x\times0,5=0,75\)'

\(\Rightarrow x:\frac{5}{10}+x\times\frac{5}{10}=\frac{3}{4}\)

\(\Rightarrow\frac{10x}{5}+\frac{5x}{10}=\frac{3}{4}\)

\(\Rightarrow2x+\frac{5x}{10}=\frac{3}{4}\)

\(\Rightarrow\frac{40x}{20}+\frac{10x}{20}=\frac{15}{20}\)

\(\Rightarrow50x=15\Rightarrow x=0,3\)

Answer 2

x/0.5+x*0.5=0.75

x*2+x*0.5=0.75

x*2.5=0.75

x=0.75/2.5

x=0.3