Question

Resolva as equações a seguir
a)x+3=0
b)y-9=0
c)2x=10
d)2x=15+1
e)2x+7=x-1
f)6+3x=5+2x
g)2x=7+x
h)x-6=2x
i)y+10=4
j)5y+1-7=19

Answer 1

a)x+3=0

x= 0 - 3

x= - 3

b)y-9=0

y= 0 + 9

y= 9

c)2x=10

x= 10/2

x= 5

d)2x=15+1

2x = 16

x= 16/2

x= 8

e)2x+7=x-1

2x - x = - 1 - 7

x= - 8

f)6+3x=5+2x

3x - 2x = 5 - 6

x= - 1

g)2x=7+x

2x - x = 7

x= 7

h)x-6=2x

x - 2x = 6

- x= 6(-1)

x= - 6

i)y+10=4

y= 4 - 10

y= - 6

j)5y+1-7=19

5y - 6 = 19

5y = 19 + 6

5y = 25

y= 25/5

y= 5