Question

1-resolva as equaçoes
a)4m-1=7
b)3a-9=11
c)3x+2=-4x+9
d)5n-2+12=6n+4
e)2b-6=18
f)2m-4+12=3m-4+2
g)3+4m-9=6m-4+
h)-5+3x+4=-129x-1
i)6m-4=12-9m
POR FAVOR e para amanha de manha

Answer 1

Resposta:

a) 4m-1=7

4m=7+1

4m=8

m=2

b)3a-9=11

3a=11+9

3a=20

a=6,666...

c)3x+2=-4x+9

3x+4x=9-2

7x=7

x=1

d)5n-2+12=6n+4

-2+12-4=6n-5n

n=6

e)2b-6=18

2b=18+6

2b=24

b=12

f)2m-4+12=3m-4+2

-4+12+4-2=3m-2m

m=10

g)3+4m-9=6m-4

3-9+4=6m-4m

-2=2m

m=-1

h)-5+3x+4=-129x-1

3x+129x=-1-4+5

132x=0

x=0

i)6m-4=12-9m

6m+9m=12+4

15m=16

m=16/15