What is the value of a in the following equation?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 7
To solve this equation, we need to use the order of operations, which is also known as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).
Let's start by evaluating the expression inside the square brackets:
40 ÷ 5 - 3 = 8 - 3 = 5
Now, we can substitute this result back into the original equation:
34 + 16 - a[5] - 15 = 0
Next, we can simplify the expression by performing the multiplication:
a[5] = 5a
Substituting this back into the equation, we get:
34 + 16 - 5a - 15 = 0
Simplifying further, we get:
35 - 5a = 0
Adding 5a to both sides, we get:
35 = 5a
Dividing both sides by 5, we get:
a = 7
Therefore, the value of 'a' that satisfies the equation is 7.