Question

2x+3y=8 ; 2x-3y=4 using cramer's rule​

Answer 1

Answer:

Here's your answer

Step-by-step explanation:

Using Cramers rule, find the determinant of the coefficient

matrix,

D=

∣

∣

∣

∣

∣

∣

3

2

2

−3

∣

∣

∣

∣

∣

∣

=3×−3−(2×2) $= -9 - 4$$ =−13

Secondly, find the determinant of x coefficient matrix,

D

x

=

∣

∣

∣

∣

∣

∣

1

5

2

−3

∣

∣

∣

∣

∣

∣

=1×−3−(5×2) =−3−10=−13

Similarly, find the determinant of y coefficient matrix,

D

y

=

∣

∣

∣

∣

∣

∣

3

2

1

5

∣

∣

∣

∣

∣

∣

=3×5−(2×1) =15−2=13

Applying Cramer's rule,

x=

D

D

x

∴x=

−13

−13

=1

y=

D

D

y

∴y=

−13

13

=−1

Therefore, x=1,y=−1

Hope it helps

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