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PamR
Jul 15, 2012, 09:32 PM
I need help with algebra substitution
3x-y=4 and 7x-2y=10

Unknown008
Jul 15, 2012, 10:23 PM
The shortest way would be to substitute the first equation into the second. And to do this, you will need to make y the subject of formula for the shortest way.

Can you do that first?

Cvholliday
Jul 16, 2012, 04:08 AM
Try transforming this equation : 3x-y=4 so that you have y=something. Then you can plug that y into the second equation and solve. I'll check back to see if you get that first part and help you through the rest :)