Question

Equaçao 2x + 16 = x + 4

Sistema 2x+5y= 1
3x+2y= -4


Considere a funçao f(x) = x-3

A) f(-1) B) (-7)

Answer 1

Oi Fabricio

a) 

2x + 16 = x + 4

2x - x = 4 - 16

x = -12

b)

2x + 5y = 1
3x + 2y = -4 

4x + 10y = 2
15x + 10y = -20

15x - 4x = -20 - 2
11x = -22
x = -2

-4 + 5y = 1
5y = 5
y = 1

S = (-2, 1)

c)

f(x) = x - 3

f(-1) = -1 - 3 = -4
f(-7) = -7 - 3 = -10

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