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OpenStudy (anonymous):
14=x+2y and 21= 3x + 10/4y solve for x and y
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OpenStudy (luigi0210):
Substitution might work here.
OpenStudy (mathstudent55):
Are these the two equations? Is the second equation correct? \(14 = x + 2y\) \(21 = 3x + \dfrac{10}{4}y\)
OpenStudy (anonymous):
yes
OpenStudy (mathstudent55):
Ok, rewrite the second equation as \(21 = 3x + 2.5y\)
OpenStudy (mathstudent55):
Now multiply the top equation by -3, and add it to the second equation. That will eliminate the x variable.
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