If x=5 and y = - 4, evaluate this expression: (-2x + 10) - (-6x + 5y + 12) + (x + 8y - 16)

Question

Mathematics

Marlene

24 June, 21:20

If x=5 and y = - 4, evaluate this expression: (-2x + 10) - (-6x + 5y + 12) + (x + 8y - 16)

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Answers (1)

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Mercedes · Answer 1

The value of the expression is - 5.

Step-by-step explanation:

(-2x + 10) - (-6x + 5y + 12) + (x + 8y - 16) =

-2x+10+6x-5y-12+x+8y-16=

(-2x+6x+x) + (-5y+8y) + (10-12-16) =

5x+3y-18

if x=5 and y=-4 then

5*5+3 * (-4) - 18=25-12-18=25-30=-5