Respuesta :

AlyssaTN

Answer:

(20x+24)-2(7x+10)

(20x+24)-(14x+20)

6x+4 but thats for 2 sides so 3x+2

B

Check:

x=3

3*3+2=11*2=22

7*3+10=31*2=62

62+22=84

20*3+24=84

jluxton16ca

Answer:

B.)   3x+2

Step-by-step explanation:

2(7x+10)+2y=20x+24

14x+20+(6x+4)=20x+24       because there are two sides where you have to

20x+14                                  multiply the height and width by two o account for

                                            both the actual number before multiplied was 3x+2

x= 1 /3 y+ −2/ 3

x=3y+2