Homework Help: maths

Posted by Marian on Monday, February 7, 2011 at 11:52am.

I am trying to understand what to do here.. need help asap!! Thanks! M

Solve the following pair of simultaneous linear equations.
3x + 4y =5
2x + 2y =2
Select the option corresponds to the solution.
Select one:
x = 9 / 7, y = 2 / 7 x = − 1, y = 2 x = 9 / 7, y = − 2 / 7 x = 2, y = − 1 x = − 2 / 7, y = 9 / 7

maths - drwls, Monday, February 7, 2011 at 11:58am
You could either solve the problem directly or try each of the x,y combinations to see which one satisfies the two equations.

Note that
3x + 4y = 5
and
4x + 4y = 4
Thus
x = -1

There is only one choice with x = -1.
maths - Marian, Monday, February 7, 2011 at 12:02pm
Thanks I understand now!

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