Question

Rezolvati :
a)2x supra 12 = 4 supra 5
b)x - 8 supra x =5 supta 7

Answer 1

2x /12 = 4 / 5
2x X 5 = 12 x 4
10 x = 48
x = 48 / 10
x = 4 , 8

x - 8 / 5 = 5 / 7
7 ( x - 8 ) = 5x
7x - 56 = 5x
7x - 5x = 56
2x = 56
x = 56 : 2
x = 28