1) Simplify : - 4x + 3(2x + 5) - 3x + 12
breaking 3(2x + 5) we get,
Now, as per the PEMDAS rule let's shorten the like terms
<u>Correct option is C i.e. - x + 27</u>
2) Simplify : 3x + 3(x + 6) - 4 - 5x
breaking 3(x + 6) we get,
Again using the same rule we see,
<u>Correct answer is option C i.e. x + 14</u>
3) Expression : y[x² - 2(1 + 2)] ÷ y + 5²
In this case we are given that <em>x = 3</em> whereas <em>y = 7</em>
Putting the values of x and y we see,
<u>Henceforth, the final answer is 28</u>