Answer: 6+4x=26, 4x=20
Step-by-step explanation: 6+4x=20 is the initial equation but completely multiplied by two, so you can know without solving that it is equivalent.
If you solve the equation, 2x+3=13 (subtract 3 from both sides)
2x=10 (divide both sides by 2)
x equals 5.
if you plug in 5 as x to 4x=20, you get 20=20, which is a true statement, so this choice is also correct. You could also solve to prove x equals 5 in this equation as well. Divide 20 by 4 and you get x=5.
Answer:
-0.6n+0.2p
Step-by-step explanation:
2.8n-0.9p-3.4n+1.1p
You can only add the numbers with the same variables (n,p)
2.8n-3.4n-0.9p+1.1p
= -0.6n+0.2p
Answer:
Susan ate less pizza than Jamie.
Step-by-step explanation:
4/6 = 2/3
6/8 = 3/4
2/3 = 8/12
3/4 = 9/12
8/12 < 9/12
2/3 < 3/4
4/6 < 6/8
Answer:
-51
Step-by-step explanation:
<u>Step 1: Solve inside the parenthesis</u>
12 + 3(18 - 42) + 9
<em>12 + 3(-24) + 9</em>
<em />
<u>Step 2: Multiply</u>
12 + 3(-24) + 9
<em>12 - 72 + 9</em>
<em />
<u>Step 3: Combine the first two numbers</u>
(12 - 72) + 9
<em>-60 + 9</em>
<em />
<u>Step 4: Combine the last two numbers</u>
-60 + 9
<em>-51</em>
<em />
Answer: -51
