Question

find the value of k if x= -k and y=5/2 is a soluation of a equation x + 4y -7 = 0​

Answer 1

X= -k

y=5/2

X+4y-7=0

-k+4*5/2-7=0

-k+10-7=0

-k+3=0

k=3

Answer 2

Answer:

k = 3

Step-by-step explanation:

$\large{\underline{\underline{\sf Given \: that :}}}$

x = -k and y = $\dfrac{5}{2}$

Equation -

$\sf x + 4y - 7 = 0 \\ \\ \implies \sf - k +4 * \frac{5}{2} - 7 = 0 \\ \\ \implies \sf - k + 10 - 7 = 0 \\ \\ \implies \sf - k + 3 = 0 \\ \\ \implies \sf - k = - 3 \\ \\ \boxed{ \therefore \bf k = 3}$

Hence, the value of k is 3.

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$\large{\underline{\underline{\mathfrak{\heartsuit \: Extra \: Information: \: \heartsuit}}}}$

If a number is a solution of the given equation, then after Substituting the values, the complete value of equation is zero.