Question

ajutati-ma va rog cu asta rapid​

Answer 1

a) 12x - 21 - 20 + 12x = 10x - 13

<=> 24x - 31 = 10x - 13

<=> 14x = 18

<=> x = 2

b) 10x - 5 - 15 - 19x = 3x - 6x - 12

<=> -9x - 20 = -3x - 12

<=> 6x = -8

<=> x = -8/6

c) 9x - 21 - 5x + 10 = 2x - 4

<=> 4x - 11 = 2x - 4

<=> 2x = 7

<=> x = 7/2 = 3,5