Question

Me falem essa ?
F)9x+20-13x= -2x+80
G)2x-14x+200=8x-150-30
i)8(2x+8)=4(3x-5)
J)9(5x-20)=10(6x+30)
K)6(7x-8)=12(5x+8)-6x
Pfvr me ajudem cm esaa

Answer 1

F) 9x - 20 - 13x = - 2x + 80

9x - 13x + 2x = 80 + 20

9x - 11x = 100

- 2x = 100

100 ÷ (-2)

x = - 50

G) 2x - 14x + 200 = 8x - 150 - 30

2x - 14x - 8x = - 150 - 30 - 200

2x - 22x = - 180 - 200

- 20x = - 380

- 380 ÷ (-20)

x = 19

i) 8.(2x + 8) = 4.(3x - 5)

16x + 64 = 12x - 20

16x - 12x = - 20 - 64

4x = - 84

- 84 ÷ 4

x = - 21

J) 9.(5x - 20) = 10.(6x + 30)

45x - 180 = 60x + 300

45x - 60x = 300 + 180

- 15x = 480

480 ÷ (-15)

x = - 32

K) 6.(7x - 8) = 12.(5x + 8) - 6x

42x - 48 = 60x + 96 - 6x

42x - 60x + 6x = 96 + 48

42x - 54x = 144

- 12x = 144

$x = \frac{144}{ - 12}$

x = - 12