Answer:
1
6
d
+
2
3
=
1
4
⋅
(
d
−
2
)
Combine
1
6
and
d
.
d
6
+
2
3
=
1
4
⋅
(
d
−
2
)
Simplify
1
4
⋅
(
d
−
2
)
.
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d
6
+
2
3
=
d
4
−
1
2
Move all terms containing
d
to the left side of the equation.
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−
d
12
+
2
3
=
−
1
2
Move all terms not containing
d
to the right side of the equation.
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−
d
12
=
−
7
6
Multiply both sides of the equation by
−
12
.
−
12
⋅
(
−
d
12
)
=
−
12
⋅
(
−
7
6
)
Simplify both sides of the equation.
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d
=
14
