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If a+b = -2 and x + y = -2 , What is 4x + 5a + 4y +5b
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4 votes
If a+b = -2 and x + y = -2 , What is 4x + 5a + 4y +5b

User Zergatul
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1 Answer

4 votes
4x + 5a + 4y + 5b
= (4x + 4y) + (5a + 5b)
= 4(x + y) + 5(a + b)

If a+b = -2 and x + y = -2, then:
4(-2) + 5(-2)
= -8 + (-10)
= -8 - 10
= -18 ← answer
User Imran Qasim
by
7.9k points
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