exam Maths Puzzle Numerical Ability

What's a colinear equation?
Can demand and supply function have colinear
if so how

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exam Other Question

write this in function form: 3x+4y=0 To whom may it concern,

I have problem to solve this questions :-

Peter and Jane together have $90. If Peter gave Jane $16, he would then have $14 less than Jane. How much does Peter has originally ?

Thank you.