9x+4y=5;4x-5y=9 by cross multiplication
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Answered by
2
Answer:
x=-1, y=1
Step-by-step explanation:
a1=9 b1=4 c1=5
a2=4 b2=-5 c2=9
x=b1c2-b2c1/a1b2-a2b1
=4*9-(-5)*5/9*(-5)-4*4
=36+25/-45-16
x=61/-61
x=-1
y=c1a2-c2a1/a1b2-a2b1
=5*4-9*9/9*(-5)-4*4
=20-81/-45-16
=-61/-61
y=61/61
y=1
Answered by
1
Step-by-step explanation:
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