I need help with this - I know I need to multiple by 100 to get ride of the decimals
solve by the elimination method 0.5x-0.2y=4 0.5x+0.3y=-7/17
Then I am lost - can some help me?
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after multiplying with 10, the first equation should be:
\[5x - 2y = 40\]
probably just a typo, tho...
you are right - typing to fast - the problem is
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why by 100?
3x-2y=40 and 5x+3y=-70/17 you do this to get rid of the decimals
that's correct (altough unnessesary). But this was a multiplication with 10!
0.3x multiplied with 100 would be 30x !
Now - 'elimination method' means, multiply one equation with some factor, so that, after adding both of the equations together either x or y is eliminated...
Can you come up with something on your own?
You are right I went back to notes - for elimination method it multiplication of 10 not 100