Question 950347
F=first integer; S= second integer
FS=70
S=70/F
F-4=2S Substitute for S
F-4=2(70/F)
F-4=140/F Multiply each side by F.
F^2-4F=140 Subtract 140 from each side.
F^2-4F-140=0*[invoke quadratic "F", 1, -4, -140 ]
Answers F=14 and F=-10  
S=70/F=70/14=5 ANSWER 1: One pair of integers that satisfies the problem is 14 and 5.
For F=-10
S=70/F=70/-10=-7 ANSWER 2: Another pair of numbers that satisfies the problem is -10 and -7.