Question

Dada a função de = 2x-3, calcule.

A) y= 6
B) y= -1
C) y= 1/3
D) y= 4/5
E) y= 1,5
F) y= -3/5
G) y= -3,2
H) y= -7
I) y= 0

Answer 1

Resposta:

A) y= 6

2x-3=y

2x-3=6

2x=3

x=3/2

B) y= -1

2x-3=y

2x-3=-1

2x=2

x=2/2

x=1

C) y= 1/3

2x-3=y

2x-3=1/3

$2x = \frac{1}{3} + \frac{3}{1}$

$2x = \frac{1 + 9}{3}$

$2x = \frac{10}{3}$

Multiplique cruzado

10=6x

5/3=x

D) y= 4/5

2x-3=y

2x-3=4/5

$2x = \frac{4}{5} + \frac{3}{1}$

$2x = \frac{4 + 15}{5}$

$2x = \frac{19}{5}$

Multiplique cruzado

19=10x

x=19/10

E) y= 1,5

2x-3=y

2x-3=1,5

2x=4,5

x=2,25

F) y= -3/5

2x-3=y

2x-3=-3/5

$2x = - \frac{ 3}{5} + \frac{3}{1}$

$2x = \frac{ - 3 + 15}{5}$

$2x = \frac{12}{5}$

Multiplique cruzado e simplifique

12=10x

6/5=x

G) y= -3,2

2x-3=y

2x-3=-3,2

2x=0.2

x=0.1

H) y= -7

2x-3=y

2x-3=-7

2x=-4

x=-2

I) y= 0

2x-3=y

2x-3=0

2x=3

x=2/3