Question

alguem pode me ajudar? É pra amanhã..a) 2×+14=5×+1 b) 3(×+2)+5=×+12 c)×+4(×-1)=9-2(×+3) d) 6(3×-2)=2(6×+3) e) 2(×-1)+2(3-×)=0 f) 7(×-1)=2(3×+1)​

Answer 1

Olá, tudo bem?

a) 2x + 14 = 5x + 1

=> 2x — 5x = 1 — 14

=> — 3x = — 13 /(—1)

=> 3x = 13

=> x = 13/3

b) 3(x + 2) + 5 = x + 12

=> 3x + 6 + 5 = x + 12

=> 3x — x = 12 — 6 — 5

=> 2x = 12 — 11

=> 2x = 1

=> x = 1/2

c) x + 4(x — 1) = 9 — 2(x + 3)

=> x + 4x — 4 = 9 — 2x — 6

=> 5x + 2x = 3 + 4

=> 7x = 7

=> x = 7/7

=> x = 1

d) 6(3x — 2) = 2(6x + 3)

=> 18x — 12 = 12x + 6

=> 18x — 12x = 6 + 12

=> 6x = 18

=> x = 18/6

=> x = 3

e) 2(x — 1) + 2(3 — x) = 0

=> 2x — 2 + 6 — 2x = 0

=> 2x — 2x = —4

=> 0x = —4, impossível

f) 7(x — 1) = 2(3x + 1)

=> 7x — 7 = 6x + 2

=> 7x — 6x = 2 + 7

=> x = 9

Espero ter ajudado!