Step-by-step explanation:
First, let's call the number we are looking for:
n
"four times a number" can be written as:
3
If it is then "increased by 15" we can write:
+
15
Likewise, "six times the number" can be written as:
6
and the result of the first phrase "is three less than this" so we can write and solve:
=
−
To solve, first, subtract
and add
to each side of the equation to isolate the
term while keeping the equation balanced:
4
0
18
(
)
2
Now, divide each side of the equation by
to solve for
while keeping the equation balanced:
9
Answer:
I think is number 18
I hope its help
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Answers & Comments
Verified answer
Step-by-step explanation:
First, let's call the number we are looking for:
n
"four times a number" can be written as:
3
n
If it is then "increased by 15" we can write:
3
n
+
15
Likewise, "six times the number" can be written as:
6
n
and the result of the first phrase "is three less than this" so we can write and solve:
3
n
+
15
=
6
n
−
3
To solve, first, subtract
3
n
and add
3
to each side of the equation to isolate the
n
term while keeping the equation balanced:
3
n
−
4
n
+
15
+
3
=
6
n
−
4
n
−
3
+
3
0
+
18
=
(
6
−
4
)
n
−
0
18
=
2
n
Now, divide each side of the equation by
2
to solve for
n
while keeping the equation balanced:
18
2
=
2
n
2
9
=
2
n
2
9
=
n
n
=
9
Answer:
I think is number 18
Step-by-step explanation:
I hope its help