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Byju's Answer
Standard VII
Mathematics
Addition of Rational Numbers
If 3 x +7=13,...
Question
If
3
x
+
7
=
13
, then
x
is
___
.
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Solution
3
x
+
7
=
13
⇒
3
x
=
13
−
7
⇒
3
x
=
6
⇒
x
=
6
3
⇒
x
=
2
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Q.
If
3
x
+
7
=
13
, then
x
is 2.
Q.
If
3
x
+
7
=
13
, then,
x
is
Q.
If
3
x
−
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=
13
, then
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Q.
If
5
-
3
2
+
3
=
x
+
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, then
(a) x = 13, y = −7
(b) x = −13, y = 7
(c) x = −13, y = −7
(d) x = 13, y = 7
