Question

Find the value of the following, if x = 2 and y = −1 (i) 5x − 2y (ii) 3x + 2y


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Answer 1

Answer:

1. 12
2. 4

Step-by-step explanation:

1. 5x - 2y

put the value of x and y

= 5(2) - 2(-1)

= 10 + 2 ( we know that - * - = +)

= 12

2. 3x + 2y

put the value of x and y

= 3(2) + 2(-1)

= 6 - 2 ( we know that + * - = - )

= 4

Answer 2

Step-by-step explanation:

1st part answers

5x - 2y

put , x=2 and y = -1

5×2 - 2 × ( -1 )

= 10 - -2 = 8

2nd part answer

3x + 2y

put , x= 2 and y = - 1

3×2 + 2 × ( -1 )

= 6 - 2 = 4