Answer:
Step-by-step explanation:
Replace all occurrences of
+
−
with a single
−
. A plus sign followed by a minus sign has the same mathematical meaning as a single minus sign because
1
⋅
−
1
=
−
1
3
−
t
−
6
=
t
−
7
Subtract
6
from
3
.
−
t
−
3
=
t
−
7
Move all terms containing
t
to the left side of the equation.
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−
2
t
−
3
=
−
7
Move all terms not containing
t
to the right side of the equation.
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−
2
t
=
−
4
Divide each term by
−
2
and simplify.
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t
=
2
