Find the value of x when the arith metic mean of x + 2 and 4x + 5 is 3x + 2.
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Find the value of x when the arith metic mean of x + 2 and 4x + 5 is 3x + 2.
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Answer:
x = 3
Step-by-step explanation:
x
+
2
+
4
x
+
5
2
=
3
x
+
2
5
x
+
7
=
2
(
3
x
+
2
)
5
x
+
7
=
6
x
+
4
7
−
4
=
6
x
−
5
x
⇒
x
=
3