Asked by Jekboy
Solve 4x+6y=21 7x-3y=3
Answers
Answered by
Steve
well, you can see from the 2nd equation that 3y=7x-3. So, 6y=14x-6
Plug that into the 1st equation to find x, and then you can get y.
Or, equivalently, multiply the 2nd by two and then you have
4x+6y = 21
14x-6y = 6
Now just add the two equations and y vanishes, leaving
18x=27
...
Plug that into the 1st equation to find x, and then you can get y.
Or, equivalently, multiply the 2nd by two and then you have
4x+6y = 21
14x-6y = 6
Now just add the two equations and y vanishes, leaving
18x=27
...
Answered by
Anonymous
Please explain further
Answered by
Vivian
Thank u so much. This page helps me a lot
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