Question

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For simultaneous equations in variables x and y Dx=49,Dy=-63,D=7 find value of x. *

(a)7

(b)-7

(c)1/7

(d)-1/7

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Answer 1

Answer:

a)7

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Answer 2

Answer:

(a) 7

Step-by-step explanation:

As, D×7=49 cause D=7 and if we multiply D i.e. 7 to y then we got 63 therefore, we should take y as 9 hence, D(7)×y(9)=63