Simplify 7(x - 1) - 2(x + 1) + 3(x - 4)
a)8 x + 21
b)8 x - 21
c)8 x - 4
1 answer:
Answer:
b) 8 x - 21
Step-by-step explanation:
Apply the distributive property.
7
x
+
7
⋅
−
1
−
2
(
x
+
1
)
+
3
(
x
−
4
)
Multiply
7
by
−
1
.
7
x
−
7
−
2
(
x
+
1
)
+
3
(
x
−
4
)
Apply the distributive property.
7
x
−
7
−
2
x
−
2
⋅
1
+
3
(
x
−
4
)
Multiply
−
2
by
1
.
7
x
−
7
−
2
x
−
2
+
3
(
x
−
4
)
Apply the distributive property.
7
x
−
7
−
2
x
−
2
+
3
x
+
3
⋅
−
4
Multiply
3
by
−
4
.
7
x
−
7
−
2
x
−
2
+
3
x
−
12
Subtract
2
x
from
7
x
.
5
x
−
7
−
2
+
3
x
−
12
Add
5
x
and
3
x
.
8
x
−
7
−
2
−
12
Subtract
2
from
−
7
.
8
x
−
9
−
12
Subtract
12
from
−
9
.
8
x
−
21=
8
x
−
21
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