Question

40%xX+20%=72

Answer 1

40% x X + 20% = 72

=>2/5 x X +1/5 =72

2/5 x X = 72 - 1/5

2/5 x X = 359/5

X=359/2

X=179,5

Answer 2

40%xX+20%=72

=> \(\frac{2}{5}xX+\frac{1}{5}=72\)

=> \(\frac{2}{5}xX=72-\frac{1}{5}=\frac{359}{5}\)

=> \(X=\frac{359}{5}:\frac{2}{5}=\frac{359}{2}\)

tích nha !

Answer 3

x=120

Answer 4

\(40\%=\frac{40}{100}=\frac{4}{10}=\frac{2}{5}xX+20\%=\frac{20}{100}=\frac{2}{10}=\frac{1}{5}=72\)72

\(\frac{2}{5}xX+\frac{1}{5}=72\)

\(\frac{2}{5}xX=72-\frac{1}{5}\)

\(\frac{2}{5}xX=\frac{360}{5}-\frac{1}{5}\)

\(\frac{2}{5}xX=\frac{359}{5}\)

\(X=\frac{359}{5}:\frac{2}{5}\)

\(X=\frac{359}{5}x\frac{5}{2}\)

\(X=\frac{359}{2}\)

Answer 5

40% x X +20% = 72

=> 40/100 x X +20/100 = 72

=> 2/5 x X +1/5 = 72 ( nếu chưa hiểu thì tui giải thich la 2/5 la khi rút gọn 40/100 va 1/5 la khi rút gọn 20/100 )

=> 2/5 x X = 72-1/5

=> 2/5x X = 359/5

=> X = 359/5 : 2/5

=> X = 259/2 (nếu mà cô giáo bắt viết thành phần trăm thi la 12950% nha)

Answer 6

dau can phai tra loi dai dong nhu the