Question

1. Resolva as seguintes equações.

a)x-3=7

b)x+4=10

c)x+101=300

d)x-8=-10

e)x+9=-1

f)3x=12

g)9x=18

h)2x+6=×+18

i) 5x-3=2×+9

Answer 1

a)x-3=7
x= 7+3
x= 10


b)x+4=10
x = 10 - 4
x = 6


c)x+101=300
x=300-101
x= 199


d)x-8=-10
x= -10 + 8
x= -2


e)x+9=-1
x= -1 -9
x = -10


f)3x=12
x = 12/3
x= 4


g)9x=18
x= 18/9
x= 2


h)2x+6=×+18
2x - x = 18 - 6
x=12

i) 5x-3=2×+9
5x -2x = 9+3
3x = 12
x= 12/3
x=4