Question

12x+3x-8x=5+4+12

2x+55=7x

4x-2x=4-16

14x-7=6x+41

15x-12=6x+15

me ajudem por favor ​

Answer 1

Resposta:

$12x + 3x - 8x = 5 + 4 + 12 \\ 7x = 21 \\ x = \frac{21}{7} \\ x = 3$

$2x + 55 = 7x \\ 2x - 7x = - 55 \\ - 5x = - 55 \\ x = \frac{ - 55}{ - 5} \\ x = 11$

$4x - 2x = 4 - 16 \\ 2x = - 12 \\ x = \frac{ - 12}{2} \\ x = - 6$

$14x - 7 = 6x + 41 \\ 14x - 6x = 41 + 7 \\ 8x = 48 \\ x = \frac{48}{8} \\ x = 6$

$15x - 12 = 6x + 15 \\ 15x - 6x = 15 + 12 \\ 9x = 27 \\ x = \frac{27}{9} \\ x = 3$