Question

Determine a raiz das equações.

1 - Y=2X-8
2- Y=4X+20
3- Y= -X-9
4- Y= -2X+10
5- Y= -5X-7
6- Y=-3X+3

Expliquem cada uma pfvr

Answer 1

1)
Y = 2X - 8
y = 0
0 = 2X - 8
8 = 2x
2x = 8
x = 8/2
x = 4
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2)

Y = 4X + 20
0 = 4X + 20
- 20 = 4x
4x = - 20
x = - 20/4
x = - 5
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3)

Y = - X - 9 
0 = - x - 9
x = - 9
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
4)

Y= -2X+10
0 = - 2x + 10
2x = 10
x = 10/2
x = 5
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
5)

Y= - 5X - 7
0 = - 5x - 7
5x = - 7
x = - 7/5

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6)

Y = - 3x + 3
0 = - 3x + 3
3x = 3
x = 3/3
x = 1