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If $E[3X+Y] = 11$ and $E[X] = 2,$ what is $E[Y]?$

If $E[4X ] = 16 ,$ what is $E[X] ?$

If $E[3X+9Y] = 6$ and $E[3X+Y] = 5,$ what is $E[X+Y]?$

If $E[X] = 3 ,$ what is $E[3X + 1 ]?$

If $E[X] = 4, E[Y] = 4 ,$ what is $E[4X+3Y]?$

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