Simplify the following expression and find value when x = -2.
- 2 (- 3x + 5) - 2 (x + 4)
Answers
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3
x
=
−
3
,
y
=
3.
Solution:
Substituting the given, we have
4
y
−
3
x
x
−
4
=
4
(
3
)
−
3
(
−
3
)
−
3
−
4
=
12
+
9
−
3
−
4
=
21
−
7
=
−
21
7
=
−
3
Hence, the value of the expression
4
y
−
3
x
x
−
4
if
x
=
−
3
,
y
=
3
is equal to
-3
.
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