Maths-

General

Easy

Question

# If then a + x =

- 42
- 24
- 60
- 66

Hint:

### Two matrices are said to be equal if: **Both the matrices are of the same order** i.e., they have the same number of rows and columns A m × n = B m × n . If the elements of the first matrix are equal to the corresponding elements in the second matrix a i j = b i j .

## The correct answer is: 66

### Given :

Equating corresponding elements, we get

x - 2y = 20

5y = 10 , y = 2

Substitute they value of y in x - 2y = 20 and find x

x - 2(2) = 20

x = 24

b = 6

a- 2b = 30

a - 2(6) = 30

a = 42

a + x = 42 + 24 = 66

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