Question

resolver as questoes em Q
a) x-9=1
b)3x-8=10
c)-2x-8=10
d)4x-5=6
e)m+=-18
f)4+-6=2x+8
g)5x-20=10-40
h)y-40=40

Answer 1

a) x - 9 = 1

x = 1 + 9

 x = 10

b)3x - 8 = 10

3x = 10 + 8

3x = 18

x = 18/3

 x = 6

c) -2x -8 = 10

-2x = 10 + 8

-2x = 18 (-1) 

2x = - 18

x = -18/2

x = -9

d) 4x - 5 = 6

4x = 6 + 5

4x = 10

x = 10/4

  x = 2,5

f) 4 + (-6) = 2x + 8

-2x = 4 -6 + 8

-2x = 6 (-1)

2x = -6

x = 6/2

x = 3

g) 5x -20 = 10 - 40

5x = 10 - 40 + 20

5x = -10

x = -10/5

 x = -2

h) y - 40 = 40

y = 40 + 40

 y = 80