Question

X+X x\(\frac{1}{3}\):\(\frac{2}{9}\)+X:\(\frac{2}{7}\)=252

 

Answer 1

\(x+x\times\frac{1}{3}:\frac{2}{9}+x:\frac{2}{7}=252\)

\(x+x\times\frac{3}{2}+x\times\frac{7}{2}=252\)

\(x\times\left(1+\frac{3}{2}+\frac{7}{2}\right)=252\)

\(x\times6=252\)

\(x=252:6\)

\(x=42\)

Answer 2

X + X x \(\frac{1}{3}\)x\(\frac{9}{2}\)+ X x\(\frac{7}{2}\)= 252

X + X x \(\frac{3}{2}\)+ X x \(\frac{7}{2}\)= 252

X x (\(\frac{3}{2}\)+ \(\frac{7}{2}\)+1) = 252

X x (\(\frac{3}{2}\)+ \(\frac{7}{2}\)+ \(\frac{2}{2}\)) = 252

X x 6 = 252

X = 252 : 6

X= 42

Chúc bạn học tốt! ^^