Question

Help me por favor!!!!!

Answer 1

3/10  =  4x/ ( x +2)
multiplique em cruz
10 * 4x = 3 ( x + 2)
40x  = 3x + 6
40x - 3x = 6
37x  = 6
x = 6/37 ****

Answer 2

Multiplica cruzado e isola o X:

$\frac{3}{10} = \frac{4X}{(X+2)} \\ 3(X+2)=40X \\ 3X+6=40X \\ 37X=6 \\ X= \frac{6}{37}$