x+y=12
x+y=2
X=

4x-27=10
5x+y=14

17x+2y=42
18+ 2= 2

9x-5y= -18
3x-14 = 6

some doesnt come out right can you help
thank you

2. Originally Posted by daisyreyesr
Does this mean that you are required to use "substitution" or some other particular method(s) for these exercises?

Originally Posted by daisyreyesr
some doesnt come out right
Does this mean that you have obtained the correct solutions to some of the above, but not to others? If so, with which are you requesting assistance? And what were your steps and solutions?

3. 4x-27=10
5x+y=14
If we take away 27 from four 'x' we got 10 left.
One thing we can do in a expression like this is to add a number to both sides.

$4x - 27 + 27 = 10 + 27$