Solve the system of linear equations by elimination - 2x+3y=7 and 5x+8y=-2

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Mathematics

11 September, 07:26

Solve the system of linear equations by elimination - 2x+3y=7 and 5x+8y=-2

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Pranav Chen · Answer 1

You would need to make them eliminate so I would multiply the entire first one by 2.5 to make the X's cancel out. So you would end up with - 5X+7.5Y=17.5. The X's would cancel and you would be left with 15.5Y=15.5. So Y=1. Then replace Y into one of the equations. I'm going to use the top again. - 2X+3 (1) = 7. Subtract 3 from both sides to get - 2x=4. Divide both sides by negative 2 to get X=-2. So the solution would be (-2,1)