السلام عليكم
first sequence
A,A+C,A+2C,A+3C,A+4C,A+5C=B
SECOND
A,A+D,A+2D,A+3D,A+4D,A+5D,A+6D=B
THEN A+5C=A+6D THEN C=5/6 D............1
WE HAVE ( A+C)-(A+D)=0.5 THEN C-D=0.5.........2
THEN FROM 1 AND 2 C=3 AND D=2.5
FROM THE FIIREST GIVEN
5A+15D-4A-10C=15.5 SUBSITITUTE C AND D THEN
A=8 AND B=23
|