Question

1 - Sendo x=4 e y=6 , substitua as variáveis nas expressões e resolva :

A)-(-x) + y =
B) y+2y-3x =
C)4x-y-5x =
D)-7-5x+6y =
E) -x-y-y+x =

Answer 1

A)
= - (- x) + y
= + x + y
= 4 + 6
= 10

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B)
= y + 2y - 3x
= 3y - 3x
= 3.6 - 3.4
= 18 - 12
= 6

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C)
= 4x - y - 5x
= 4x - 5x - y
= - x - y
= - 4 - 6
= - 10

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D)
= - 7 - 5x + 6y
= - 7 - 5.4 + 6.6
= - 7 - 20 + 36
= - 27 + 36
= 9

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E)
= - x - y - y + x  
= - x + x - 2y
= - 2y
= - 2.6
= - 12

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