Question 193268: can you please help me solve -2x + 5y = 15 i did -2 * 0 + 5y = 15 0 + y = 15 y = 15
Answer by RAY100(1637)   (Show Source):
You can put this solution on YOUR website! usually to solve linear equation with 2 unknowns, we have two equations explaining the relationship.
since we only have one, we can describe the line, which will define all the relationships.
-2x+5y =15
setting up a T box
"X",,,,,,,,,,"Y",,,,,,,,,,,,calc
0,,,,,,,,,,,,,3,,,,,,,,,5y=15+2(0), y=3
5,,,,,,,,,,,,,5,,,,,,,,,5y=15+2(5)=25,, y=5
10,,,,,,,,,,,7,,,,,,,,,5y=15+2(10)=35, y=7
15,,,,,,,,,,,9,,,,,,,,,5y=15+2(15)=45, y=9
20,,,,,,,,,,11,,,,,,,,5y=15+2(20)=55, y=11
hopefully this gets you started
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