Question 28246: 0.5x-2y=17
2x+y=7
Answer by zeynep(43)   (Show Source):
You can put this solution on YOUR website! 0.5x-2y=17
2x+y=7
Let's multiply the second equation by 2;
0.5x-2y=17
4x+2y=14
Now, let's add the two equations side by side.
4.5x = 31 (If we divide both sides by 4.5)
x = 31/4.5
Let's simplify 31/4.5;
31/4.5 = 310/45 = 62/9
So, x = 62/9
Now let's insert x's value into the second equation(you may insert it into the first equation as well);
2.62/9 + y = 7
124/9 + y = 7
y = 7 - 124/9
y = -61/9
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