Question

solve
the
following equation using cramer's
2x-y + 8 z=13, 3x+4y + 5z = 18,
rule
5x - 2y + 7z=20


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Answer 1

Answer:

z=1

y=1

x= 3

Step-by-step explanation:

(2x-y+8z=13 ) × 4

3x+4y+5z=18

addition

11x+37z=70 _______ (1)

3x+4y+5z=18

(5x-2y+7z=20 ) ×2

addition

13x+19z =58________(2)

solving 1 and 2 ...z=1

putting z=1 in (1) , we get x = 3

putting z=1 and x=3 in any of the aBove given 3 equations in questions, we get y=1