Posted by Me on Tuesday, April 13, 2010 at 2:56pm.
Thanks Dylan! But I wanted to know HOW to WRITE OTHER equations to have the same answers as the ones below? NOT how to solve these!
2x+5y=8
x3y=7

Math  Reiny, Tuesday, April 13, 2010 at 3:13pm
I will assume you don't want just multiples of the above, so we will need the actual solution to yours first
double the second:
2x  6y = 14
subtract form the first
11y = 22
y = 2
then in the second:
x  6 = 7
x = 1
now just make up any combination of x's and y's, sub in the 2 values and see what constant you get
e.g.
4x + 3y = 4 + 6 = 2
so 4x + 3y = 2 is one equation.
Now do the same thing for a second one

Math  Me, Tuesday, April 13, 2010 at 10:14pm
Many thanks Reiny!!
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