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Let’s check out your problem:
Evaluate
a
+
(
−
b
)
a+(-b)
a
+
(
−
b
)
where
a
=
4
a=4
a
=
4
and
b
=
2
b=2
b
=
2
.
View step-by-step help
Home
Math Problems
Grade 8
Evaluate multi-variable expressions
Full solution
Q.
Evaluate
a
+
(
−
b
)
a+(-b)
a
+
(
−
b
)
where
a
=
4
a=4
a
=
4
and
b
=
2
b=2
b
=
2
.
Given Values:
We are given:
\newline
a
=
4
a = 4
a
=
4
\newline
b
=
2
b = 2
b
=
2
\newline
The expression to evaluate is
a
+
(
−
b
)
a + (-b)
a
+
(
−
b
)
.
\newline
Substitute
4
4
4
for
a
a
a
and
2
2
2
for
b
b
b
in the expression
a
+
(
−
b
)
a + (-b)
a
+
(
−
b
)
.
\newline
a
+
(
−
b
)
=
4
+
(
−
2
)
a + (-b) = 4 + (-2)
a
+
(
−
b
)
=
4
+
(
−
2
)
Substitute Values:
Now, simplify the expression
4
+
(
−
2
)
4 + (-2)
4
+
(
−
2
)
.
\newline
Adding a negative number is the same as subtracting the number.
\newline
4
+
(
−
2
)
=
4
−
2
4 + (-2) = 4 - 2
4
+
(
−
2
)
=
4
−
2
Simplify Expression:
Subtract
2
2
2
from
4
4
4
.
\newline
4
−
2
=
2
4 - 2 = 2
4
−
2
=
2
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\newline
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\newline
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\newline
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\newline
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\newline
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−
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