Question

A) x-3/x = 4/5
B) x-3/18 = 1/2
C) 6/10 = x/x+2

Me Ajudem !!!!

Answer 1

A)X-3/X = 4/5
só multiplicar em cruz:
5X - 15 = 4X
5X - 4X = 15
X = 15

B)x . 3/1 = 18 . 2/1 
3x = 18 . 2
3x = 36
x  =12

C)6*(x+2) = 10x
6x+12 = 10x
10x-6x = 12
4x = 12
x = 12/4
x = 3