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If a+b=-2 And x+y= -2 what is 4x+5a+4y+5b?
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If a+b=-2 And x+y= -2 what is 4x+5a+4y+5b?

User Gerard Sexton
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a + b = -2

x + y = -2

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

substitute

4(-2) + 5(-2) = -8 - 10 = -18

User Violeta
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