Question

Resolva as equações abaixo , sendo U=Q

A)4x+9=27
B)-11+19x=27
C)-30=2-65x
D)31=61-90x
E)100=7x-12
F)4x+7=x-8
G)x-1=7-2x
H)5+x=7+8x
I)x-3=11+14x
J)2x-17=28+7x

Me ajudem nessas pfvr.
Dou 20pts.

Answer 1

Resposta:

a) 4x+9=27

4x=27-9

4x=18

x=18/4

x=9/2

b) -11+19x=27

19x=27+11

19x=38

x=38/19

x=2

c) -30=2-65x

-65x=-30-2

-65x=-32

x=-32/-65

x=32/65

d) 31=61-90x

-90x=31-61

-90x=-30

x=-30/-90

x=30/90

x=1/3

e) 100=7x-12

7x=100+12

7x=112

x=112/7

x=16

f) 4x+7=x-8

4x-x=-8-7

3x=-15

x=-15/3

x=-5

g) x-1=7-2x

x+2x=7+1

3x=8

x=8/3

h)5+x=7+8x

x-8x=7-5

-7x=2

x=-2/7

i) x-3=11+14x

x-14x=11+3

-13x=14

x=-14/13

j) 2x-17=28+7x

2x-7x=28+17

-5x=45

x=-45/5

x=-9