Simplify 7(x - 1) - 2(x + 1) + 3(x - 4)

a)8 x + 21
b)8 x - 21
c)8 x - 4

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

i'm not sure i quite understand, could you provide more information?

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step-by-step explanation: