Question

1-Resolva as Equações:
a) 4x + 2 = 38
b) 9x = 6x + 12
c) 5x-1= 3x + 11
d) 2x+8 = x + 13
e) 2x + 7 = x
f)-7y+3y= 4y + 3​

Answer 1

Resposta:

a )

4x + 2 = 38

4x = 38 - 2

4x = 36

x = 36/4

x = 9

b )

9x = 6x + 12

9x - 6x = 12

3x = 12

x = 12/3

x = 4

c )

5x - 1 = 3x + 11

5x - 3x = 1 + 11

2x = 12

x = 12/2

x = 6

d )

2x + 8 = x + 13

2x - x = 13 - 8

x = 5

e )

2x + 7 = x

2x - x = - 7

x = -7

f )

-7y + 3y = 4y + 3

-7y + 3y - 4y = 3

-4y -4y = 3

-8y = 3

y = -8/3

y =

$- \frac { 8}{3}$

Answer 2

a 4x= 38-2
x=36:4
x= 9

b 9x - 6x = +12
3x = +12
x=+12:3
x=4


c 5x-3x = +11 -1
2x =+10
x=10:2
x=5

d 2x-x = 13-8
1x=5

e 2x-x=7
1x=7

f -7y+3y-4y=3
-8y=3
y=3:-8
y= - 0,375
espero ter ajudado!