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Solve for D. 4 - 3d = d - 8
asked
Aug 14, 2018
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2
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Solve for D.
4 - 3d = d - 8
Mathematics
middle-school
Steve Gelman
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Steve Gelman
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2
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6
votes
The answer to your equation is d = 3
Naved Khan
answered
Aug 16, 2018
by
Naved Khan
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5
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Simplify both sides.
4−
3d
=
d−8
4+
−
3d
=
d+
−8
−
3d
+4
=
d−8
Subtract d from both sides.
−
3d
+4
−d
=
d−8
−d
−
4d
+4
=
−8
Subtract 4 from both sides.
−
4d
+4
−4
=
−8
−4
−
4d
=
−12
Divide both sides by -4.
−
4d
−4
=
−12
−4
d=
3
Your answer is
d=3
.
Mari
answered
Aug 19, 2018
by
Mari
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