Question

Resolva as seguintes equações a)7(×-1)=5-2× b)10×-1=4(×+1) c)3(×-2)=5×-8 d)6×-3(4-2×)0 e)3(×+1=4(×+2) f)5×-9(2-×)=0 g)6(2+×)=-2(-6+3×). H)2(×-1)-9×=6×. I)2(×-3)+3(×-1)=36. J) 4(×-1-10=5(5×-1). Me ajudem por favor urgente

Answer 1

Resposta:

a) x = 12/9    b) x = 5/6    c)x = 1    d) x = 1   e) x = -5   f) x = 9/7   g) x = 0   h) x = -2/13   i) x = 9   j) x = 11/21

Explicação passo-a-passo:

a) 7x-7 = 5-2x

7x+2x = 5+7

9x = 12

x = 12/9

b) 10x-1 = 4x+4

10x-4x = 4+1

6x = 5

x = 5/6

c) 3x-6 = 5x-8

3x-5x = -8+6

-2x = -2 (-1)

2x = 2

x = 1

d) 6x-12+6x = 0

12x = 12

x = 1

e) 3x+3 = 4x+8

3x-4x = 8-3

-x = 5 (-1)

x = -5

f) 5x-18+9x = 0

14x = 18

x = 18/14 (:2)

x = 9/7

g) 12+6x = 12-6x

12x = 0

x = 0

h) 2x-2-9x = 6x

-7x -6x = 2

-13x = 2 (-1)

x = -2/13

i) 2x-6+3x-3 = 36

5x = 36+9

x = 45/5

x = 9

j) 4x-4-10 = 25x -25

4x-25x = -25+14

-21x = -11 (-1)

x = 11/21