Question

resolva as equações

a)x+5=12

b)y+9=3

c) x-12=15

d)y+5=-4

e)2x=8

f)3x=10

g)5x=20

h)5x=20

i)2x-1=×+5

j)2×+7=5

Answer 1

a)x=12-5
x=7

b)y=3-9
y= -6

c)x=15+12
x=27

d)y=-4-5
y=-9

e)x=8/2
x=4

f)x=10/3

g)x=20/5
x=4

h) '' '' 

i) 2x-1=x+5
2x-x=5+1
x=6

j) 2x=5-7
2x=-2
x=-2/2
x=-1

Answer 2

a) x=12-5
x=7

b)y=3-9
y=-6

c)x=15+12
x=27

d)y=-4-5
y=-9