Solve 7/3 = (5/x) + 4.
7x=15 + 4 (cross multiply) ........... You cannot cross-multiply like that. Better method is - multiply both sides by 3*x (LCD):
7 *x = 15 + 12*x
x = -3
Check
5/x + 3 = 5/(-3) + 4 = (5 - 12)/(-3) = (-7)/(-3) = 7/3
Checks....
7x=19
is that correct?
No, you have to multiply (3x)(5/x+ 4)= 15+ 12x, not 15+ 4.Solve 7/3 = (5/x) + 4.
7x=15 + 4 (cross multiply)
7x=19
is that correct?