Question

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Answer 1

Hii

here is your answers

when x=-1 and y=2

k=3x + 4y

k=3(-1) + 4(2)

k=-3 + 8

k=5

Answer 2

GIVEN:

• x = –1
• y = 2
• 3x + 4y = k

TO FIND:

• What is the value of k ?

SOLUTION:

We have given that, the solution of the equation are –1 and 2

• Equation = 3x + 4y = k
• x = –1
• y = 2

We have to find the value of k

According to given conditions:-

On putting the given values in the equation, we get

$\rm{\hookrightarrow 3x + 4y = k }$

Put the values in equation:

• x = –1
• y = 2

$\rm{\hookrightarrow 3 \times -1 + 4 \times 2 = k}$

$\rm{\hookrightarrow -3 + 8 = k }$

$\bf{\hookrightarrow 5 = k }$

• k = 5

❝ Hence, the value of k is 5 ❞

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