1. Which of the following is not a linear equation?
(a) x2=20
(b) p-1=0
(c) 2y=18
(d) x+y=11
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Answer:
( a)x2 = 20
x=20÷2
x=10
(b) p-1=0
p=1+0
p=1
(c) 2y=18
y= 18÷2
y=9
(d) x+y=11
Answer is no. (d) x+y=11
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