Question

Determine a raiz de cada função

A) y = 2x - 8

B) y = -3 + x

C) y = 3x + 5

Answer 1

A)
y = 2x - 8
0 = 2x - 8
8 = 2x
2x = 8
x = 8/2
x = 4

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B)
y = -3 + x 
0 = - 3 + x
3 = x
x = 3

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C)
y = 3x + 5
0 = 3x + 5
- 5 = 3x
3x = - 5
x = - 5/3