Question
solve simultaneously
0.5m +0.2n # 5........(1)
0.6m +0.4n # 8.4.......(2)?
0.5m +0.2n # 5........(1)
0.6m +0.4n # 8.4.......(2)?
Answers
oobleck
what, your keyboard has no = key?
multiply the first equation by 2 and you now have
1.0m + 0.4n = 10
0.6m + 0.4n = 8.4
now subtract the 2nd from the 1st, and the n's go away, leaving
0.4m = 1.6
Now you can finish up. Find m, then use that in either equation to find n.
multiply the first equation by 2 and you now have
1.0m + 0.4n = 10
0.6m + 0.4n = 8.4
now subtract the 2nd from the 1st, and the n's go away, leaving
0.4m = 1.6
Now you can finish up. Find m, then use that in either equation to find n.