Solve Linear Systems
International Brotherhood of Electrical Workers Exam IBEW · Flashcards
INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS EXAM IBEW · FLASHCARDS
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QUESTION
What is the intersection point of the lines
x
=
2
x=2
x
=
2
and
y
=
−
3
y=-3
y
=
−
3
?
QUESTION
Which point is the solution to
x
+
y
=
5
x+y=5
x
+
y
=
5
and
x
−
y
=
3
x-y=3
x
−
y
=
3
?
QUESTION
Solve by elimination:
x
+
2
y
=
8
x+2y=8
x
+
2
y
=
8
and
3
x
−
2
y
=
4
3x-2y=4
3
x
−
2
y
=
4
.
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ANSWER
(
3
,
5
2
)
(3,\frac{5}{2})
(
3
,
2
5
)
. Adding eliminates y, giving
4
x
=
12
4x=12
4
x
=
12
so
x
=
3
x=3
x
=
3
, then
2
y
=
5
2y=5
2
y
=
5
so
y
=
5
2
y=\frac{5}{2}
y
=
2
5
.
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