Question

[nguyễn Thanh Hà]

Giải phương trình:

\(\frac{x+2}{13}+\frac{2x+45}{15}=\frac{3x+8}{37}+\frac{4x+69}{9}\)

Answer 1

[dinh thi tuyet hong]

<=>(x+2/13)+1+(2x+45/15)-1 = (3x+8/37)+1+(4x+69/9)-1

<=> x+15/13 + 2x+30/15 = 3x+45/37 + 4x+60/9

<=>(x+15)(1/13+2/15-3/37-4/9) = 0

<=> x+15=0( vì 1/13+2/15-3/37-4/9=0)

<=>x=-15......