Question

cum se rezolva exercitiul: (12+X)+14=4xX-4 ?

Answer 1

12 + x + 14 = 4x - 4
12+14+4 = 4x - x
30 = 3x  |:3
x = 10

Answer 2

$\displaystyle (12+x)+14=4x-4 \\ 12+x+14=4x-4 \\ x-4x=-4-12-14 \\ -3x=-30 \\ x= \frac{-30}{-3} \\ x=10$