16 people would be at the dinner because Jim and Sarah invited 7 friends and each friend brought 1 guest, so you do 7*2=14 and the 14 + Jim and Sarah=16 people.
3/4(x) + 5 - 1/2(x) = 3
If x = -8 then,
3/4(-8) + 5 - 1/2(-8)
-6 + 5 - (-4)
-6 + 9
3 = 3
Your answer would be that x = -8
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:)
Sin35 = 3/x
i think it would simplify to x = sin(35)/3