**Answer:**

10 pencils for $4.00 is better.

**Step-by-step explanation:**

If you divide 4.00 by 10 you'll find that each pencil is worth 40 cents. When you divide 2.70 by 6 then each pencil is worth 45 cents paying more for each pencil than the other deal.

**Step-by-step explanation:**

22+2x+8= x+20

2x+30=x+20

x+30=20

x=-10

answer is -10

they are the same. they are = (equal)

**Answer:**

7.5

**Step-by-step explanation:**

Given;

- Bert earns $35,000 gross annual salary
- Any amounts earned up to $20,000 are taxed at x%
- Any amounts earned beyond $20,000 are taxed at 20%
- Bert pays $4,500 per annum in income tax

To find x

Amount earned beyond $20,000

= $35,000 - $20,000

= $15,000

That is the amount to be taxed at 20%

Therefore,

x% × 20000 + 20% × 15000 = 4500

200x + 3000 = 4500

200x = 4500 - 3000

200x = 1500

x = 1500/200

x = 7.5