Mathematics
Easy

Question

# Find the value of the expression 3x + y where x and y are 2 and 3, respectively?

## 9    12    10    11 Hint:

## The correct answer is: 9

### The given equation is 3x+y.Here, there are two variables and one constant. In the first term, the variable x is multiplied by a constant '3'. And between the two terms '3x' and 'y', we have a plus sign. The plus sign means we have to add the two quantities.Now, in the given question, values are assigned to x and y. So, we have to substitute the values of x and y in the given expression and we have to do the operations.As per the question, the value of x is 2 and the value of y is 3. Now we will replace x and y with given values as follows:  3x+y=3(2)+3Solving further we get,  3x+y=6+3. And 6+3 adds to 9.Therefore, the equation becomes 3x+y=9. So, option (b), which is '9', is the right answer.

The variables have the assigned value only in this question. Under different conditions they take different values.

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