Question

Здравствуйте, можете пожалуйста помочь?

Answer 1

Hi!

(1)

$\boldsymbol{(7x+y)-(-x-2y)}$

Step 1: Distribute the minus.

$\boldsymbol{(7x+y)+x+2y}$

Step 2: Combine like terms.

$\boldsymbol{7x+y+x+2y}$

$\boldsymbol{7x+x+y+2y}$

$\boldsymbol{8x+3y}$ <- Answer.

(2)

$\boldsymbol{(b-3)+(2b+2)}$

Step 1: Simplify.

$\boldsymbol{b-3+2b+2}$

Step 2:  Combine like terms.

$\boldsymbol{b+2b-3+2}$

$\boldsymbol{3b-1}$ <- Answer.

(3)

$\boldsymbol{3x(4y-z)}$

Step 1: Distribute 3x.

$\boldsymbol{12xy-3xz}$ <- Answer.

(4)

$\boldsymbol{2a(3b-7)}$

Distribute 2a:

$\boldsymbol{6ab-14a}$

Hope that helped! :)