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5
(
s
+
3
)
+
2
S
−
1
=
2
(
2
S
−
1
)
+
28
5(s+3)+2 S-1=2(2 S-1)+28
5
(
s
+
3
)
+
2
S
−
1
=
2
(
2
S
−
1
)
+
28
View step-by-step help
Home
Math Problems
Algebra 2
Sum of finite series starts from 1
Full solution
Q.
5
(
s
+
3
)
+
2
S
−
1
=
2
(
2
S
−
1
)
+
28
5(s+3)+2 S-1=2(2 S-1)+28
5
(
s
+
3
)
+
2
S
−
1
=
2
(
2
S
−
1
)
+
28
Simplify Equations:
Simplify both sides of the equation.
\newline
Left side:
5
(
s
+
3
)
+
2
s
−
1
=
5
s
+
15
+
2
s
−
1
=
7
s
+
14
5(s+3) + 2s - 1 = 5s + 15 + 2s - 1 = 7s + 14
5
(
s
+
3
)
+
2
s
−
1
=
5
s
+
15
+
2
s
−
1
=
7
s
+
14
.
\newline
Right side:
2
(
2
s
−
1
)
+
28
=
4
s
−
2
+
28
=
4
s
+
26
2(2s - 1) + 28 = 4s - 2 + 28 = 4s + 26
2
(
2
s
−
1
)
+
28
=
4
s
−
2
+
28
=
4
s
+
26
.
Set Equal:
Set the simplified expressions equal to each other.
7
s
+
14
=
4
s
+
26
7s + 14 = 4s + 26
7
s
+
14
=
4
s
+
26
.
Isolate Variable Term:
Subtract
4
s
4s
4
s
from both sides to isolate the variable term on one side.
\newline
7
s
−
4
s
+
14
=
4
s
−
4
s
+
26
7s - 4s + 14 = 4s - 4s + 26
7
s
−
4
s
+
14
=
4
s
−
4
s
+
26
,
\newline
3
s
+
14
=
26
3s + 14 = 26
3
s
+
14
=
26
.
Subtract to Solve:
Subtract
14
14
14
from both sides to solve for
s
s
s
.
\newline
3
s
+
14
−
14
=
26
−
14
,
3s + 14 - 14 = 26 - 14,
3
s
+
14
−
14
=
26
−
14
,
\newline
3
s
=
12.
3s = 12.
3
s
=
12.
Divide to Find Value:
Divide both sides by
3
3
3
to find the value of
s
s
s
.
3
s
3
=
12
3
\frac{3s}{3} = \frac{12}{3}
3
3
s
=
3
12
,
s
=
4
s = 4
s
=
4
.
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∑
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2
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\newline
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