Question

1) For simultaneous equations in x and y.
Dx = 49, Dy= -63, D=7, then what is x?
a) 7
b) -7
c)1/2
d) 2
@AliZainab92 or someone pls solve this doubt​

Answer 1

Answer:

$a) \: \: 7$

Step-by-step explanation:

$dx = 49 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: x = \frac{dx}{d} = \frac{49 \times \: x }{7} \\ x = 7$