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Byju's Answer
Standard VII
Mathematics
Solution of Inequations
Which of the ...
Question
Which of the following is not equivalent inequation to -3x+1 > 4 ?
A
-3x > 3
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B
x > -1
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C
x< -1
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D
-5x > 3 - 2x
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Solution
The correct option is
B
x > -1
−
3
x
+
1
>
4
⇒
−
3
x
+
1
−
1
>
4
−
1
⇒
−
3
x
>
3
⇒
−
3
x
−
3
<
3
−
3
⇒
x
<
1
a
n
d
,
−
5
x
>
3
−
2
x
⇒
−
5
x
+
2
x
>
3
⇒
−
3
x
−
3
<
3
−
3
⇒
x
<
1
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Similar questions
Q.
Which of the following are quadratic equations?
(i) x
2
+ 6x − 4 = 0
(ii)
3
x
2
-
2
x
+
1
2
=
0
(iii)
x
2
+
1
x
2
=
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(iv)
x
-
3
x
=
x
2
(v)
2
x
2
-
3
x
+
9
=
0
(vi)
x
2
-
2
x
-
x
-
5
=
0
(vii) 3x
2
− 5x + 9 = x
2
− 7x + 3
(viii)
x
+
1
x
=
1
(ix) x
2
− 3x = 0
(x)
x
+
1
x
2
=
3
x
+
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x
+
4
(xi) (2x + 1) (3x + 2) = 6(x − 1) (x − 2)
(xii)
x
+
1
x
=
x
2
,
x
≠
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(xiii) 16x
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− 3 = (2x + 5) (5x − 3)
(xiv) (x + 2)
3
= x
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− 4
(xv) x(x + 1) + 8 = (x + 2) (x − 2)