Answer:
<h2>a = 11</h2>
Step-by-step explanation:

Answer:
<h2>9</h2>
Step-by-step explanation:
<em>4x - 7</em>
<em>Put </em><em>x = 4</em><em> to the expression:</em>
<em>4(4) - 7 = 16 - 7 = 9</em>
Yes, you need to make the denominators the same. 2/3 becomes 8/12. So now you add 7/12 and 8/12, getting 15/12. But you're not done you need to simplify 15/12. The answer is 1 1/4.
Answer:
72
Step-by-step explanation:
Multiply 8 and <em>n </em>to get 8n
Multiply 3 and 192 to get 576
Write them equal to each other 
To isolate the variable divide by 8 on both sides

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