book Maths Puzzle Numerical Ability

Find the median.

20 15 17 25 22

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book Other Question

Solve using the substitution method.

#1

y=5-x
3x-4y=-20

#2

x+2y=6
2x+3y=8

#3

3x+y=1
x=2y+5

#4

x+y=6
y=3-2x

#5

s+t=5
s=13-3t

#6

x-y=4
y=2-x (x+2)(x-6)=20