Question

tìm số nguyên x,biết

2x-9/240=39/80

Answer 1

Ta có: \(\frac{2x-9}{240}=\frac{39}{80}\)

=> \(\frac{2x-9}{240}=\frac{117}{240}\)

=> 2x-9 = 117

=> 2x = 117+9

=> 2x = 126

=> x = 126:2

=> x = 63

Answer 2

Answer 3

Ta có: \(\frac{2x-9}{240}=\frac{39}{80}\)

=> \(\frac{2x-9}{240}=\frac{156}{240}\)

=> 2x-9 = 156

=> 2x = 156+9

=> 2x = 165

=> x = 82,5