Twin46
1 Answer
Barbara01
<font face="Arial, 'liberation sans', sans-serif">
</font>
<font face="Arial, 'liberation sans', sans-serif">x+y=3, 3x-y=1
move x the the other side of the first equation: y=3-x
then substitude y in the second equation with 3-x --> 3x-(3-x)=1 ---> 3x-3+x=1 ---> 4x=4 ---> x=1
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| 13 years ago. Rating: 0 | |
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