exam Maths Puzzle Numerical Ability

A= 4B
B= ?
C= B-20

What is B equal to.

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exam Other Question

Give the sum p+q where p/q is the reduced fraction represented by the repeating decimal 2.1. how do you show your work on perpendicular equations like this, 1) y = -1/3+1,
Y = -3x+3 2) y =3/5x+2, Y = -5/3x-2 3) Y = -5, x=5