Question

(FMG-SP)Em 4/3+x + 2/6+2x=5/2,o valor de x é: a)1 b)0,1 c)-1 d)-3

Answer 1

4/(3+x) + 2/(6+2x) = 5/2 ---> 10/(2x+6) = 5/2 --> 20 = 10x + 30 ---> 10x = -10
---> x = -1