x-3y-7=0
3x-3y-15=0
using
Elimination method
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Answered by
4
Answer:
3 (×-3y=7)
3x-3y=15
3×-9y=21
3×-3y=15 (change signs of down one)
3x-9y=21
-3×+6y= -15
0 -3y=6
y= -6/3
y= -2
substituting y value in 1 equation
x-3y=7
×-3 (-2)=7
x+6=7
x=7-6=1
×=1,y= -2
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