Question

resolva as equações do 1° grau com uma variável.

d) 1 + 6 - x = x + 25



e) 20 x - 13 = 20 + 9 x


f) 21 x + 1 = 11 x + 6


g) 9 x - 23 = 13 - 27


h) 0,8 + 2 x = x + 3,5

i) 3,5 x + 1 = 3,1 x + 3

j) 5 - x - 22 = 4 x - 11 - 6 x​

Answer 1

Resposta:

a-2x-8=8

2x = 8+8

2x=16

x=8

b-3x+1=19

3x=19-1

3x=18

x=6

c-7y-4=10

7y=10+4

7y=14

y=2

d-2t+1=-8

2t=-8-1

2t=-9

t=-9/2

e-11=3y=2

11-2=3y

9=3y

y=3

f-3=-7+x

3+7=x

x=10

g-9x+5=4x

9x-4x=-5

5x=-5

x=-1

h-20=6x+32

20-32=6x

-12=6x

x=-2

j-y+9y+5=-15

10y = -15-5

10y = -20

y=-2

l-17-1=15x+3

17-1-3=15x

13=15x

x=13/15

m-16-x=x+25

-x-x=25-16

-2x=9

x=-9/2

n-20x-13=20+9x

20x-9x=20+13

11x=33

x = 3

o-21x+1=11x+6

21x-11x=6-1

10x=5

x=1/2

p-9x-23=13x-27

9x-13x=-27+23

-4x=-4

x=1