Answer:
Mark gets £54
Explanation:
Let Gavin share=x
Henry=3x
Mark=2(3x)
x+3x+2(3x)=£90
x+3x+6x=£90
10x=£90
x=9
Gavin=x=£9
=3(9)=£27
=2(3*9)
=2(27)
=£54
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