Question

Pfvr me ajudem

b) 3 ( x - 2 ) = 4 (-x + 3)
c) 2 (x +1) - (x -1) = 0
d) 5(x + 1) -3 (x +2) = 0
e) 13 + 4(2x -1) = 5 (x +2)
f) 4(x + 5) + 3 (x +5)= 21

Answer 1

b) 3x - 6 = -4x +12

3x +4x = 12 +6

7x = 18

x = 18/7

c) 2x +2 - x +1=0

x +3 =0

x = -3

d) 5x +5 -3x -6=0

2x - 1 =0

2x = 1

x = 1/2

e) 13 +8x -4 = 5x +10

8x +9 = 5x +10

8x - 5x = 10 -9

3x = 1

x = 1/3

f) 4x +20 + 3x +15 = 21

7x + 35 = 21

7x = 21 - 35

7x = - 14

x = -14/7

x = - 2