exam Maths Puzzle Numerical Ability

Solve for the unknown: 8/52 = m/39

I have no clue about these at all HELP.

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exam Other Question

x+3y+5z-4w=1
X+3y+z-2w+v=-1
x-2y+z-w-v=3
x-4y+z+w-v=3
x+2y+z-w+v=-1 9x-3<6-x+9x

What do you do after combining like terms?