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mazdek
Answers (1)
x-1/y-1=3/4 x+1/y+1=4/5 (cross multiplication) (cross multiplication) 5x+5=4y+4------>5x-4y=-1 4x-1=3y-3---->4x-3y=1(eq.1) 5(4x-3y=1)---->20x-15y=5 4(5x-4y=-1)--->-20x+16y=4 ----------------------- 1y=9 y= 9/1=9 4x-3y=1(put 9) 4x-3(9)=1-->4x-27=1 4x=1+27
