Question 335896
solve {{{ (2x+9)/(4x-15)=5/7 }}}
The easiest way is cross multiply this guy
7(2x + 9) = 5(4x - 15)
:
14x + 63 = 20x - 75
:
63 + 75 = 20x - 14x
:
138 = 6x
x = {{{138/6}}}
x = 23
:
:
Check it in the original problem x=23