Answer:
add 8x to both sides of the inequality
Step-by-step explanation:
4(x+7)=8x-20
4x+28=8x-20
28=4x-20
48=4x
x=12
Answer: 18 square ft.
Step-by-step explanation:
Surface area is length*width. 1*1= 1*6= 6
since there are three cubes, it is 6*3= 18 square ft total.
