The least common multiple is 63.
Explanation: 63 is the least number that 3 7 and 9 can go into evenly. Therefore, it is the least common multiple.
1hr 6min left because all you have to do is keep subtracting
Here you go, hope it helped you out
{5x-7y=-2
<u>{-5x-10y=-15 </u>(+)
<em>5x-5x-7y-10y=-17</em>
<em> </em>-17y=-17 /:(-17)
y=1
<em /><em>5x-7 *1=-2</em>
<em />5x-7=-2 /+7
5x=5 /:5
x=1
<u>Solution:</u> (1; 1)
