Question

For simultaneous equations in variables x and y, Dx = 49, Dy = - 63, D = 7 then what is x ?
(A) 7
(B) -7
(C) 1/7
(D) -1/7

Answer 1

Hey dear,

● Answer -
(A) x = 7

● Explanation -
# Given -
D = 7
Dx = 49
Dy = -63

# Solution -
Value of x can be calculated by -
x = Dx / D
x = 49 / 7
x = 7

Value of y can be calculated by -
y = Dy / D
y = -63 / 7
y = -9

Thanks for asking.
Hope this helped you..

Answer 2

Answer:

☆ Formula ( x= Dx / D )

so ,

x = ? ( the question says that find the value of x )

Dx= 49

D= 7

x = Dx / D

x = 49 / 7 ( 7 divides by 49 so the answer is 7 )

So , x = 7