Question

Dy
$$% Solved Example $$$
Ex. (1) Solve the following simultaneous equations using Cramer's Rule.
5x + 3y = -11 ; 2x + 4y = -10
Solution : Given equations
5x + 3y = -11
2x + 4y = -10
By Crar
5
3
D =
2
4
= (5 X 4) - (2 x 3) = 20 - 6 = 14
-11
3
Dx =
-10 4
= (-11) X 4 - (-10) X 3 = -44 -(-30)
= -44 + 30 = -14
Activit
5 -11
2 -10
/
= 5 X (-10) - 2 X (-11) = -50 -(-22)
D
= -50 + 22 = -28
Dy
and y =
-14
1 y
X =
= -1
-28
14
= -2
D
14
.. (x, y) = (-1, -2) is the solution.
Activity
To solve the simultaneous equations by​

Answer 1

Answer:

verify the closure property of the addition for the following rational numbers -5/9 and 5/9