solve for x and y

Algebra
Tutor: None Selected Time limit: 1 Day

x+y=26;  xy=153.  solve for x & y?

Oct 28th, 2015

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x + y = 26 ---(1) 

xy = 153 ---(2)


From equation (1)

y = 26 - x ---(3)


Substitute y from equation (3) in equation (2)

x(26 - x) = 153



Substitute x=17 in equation (3)

y = 26 - 17 = 9


Substitute x=9 in equation (3)

y = 26 - 9 = 17


So the solution is (17, 9) and (9, 17).

These are the points at which the line and the curve intersect.

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Oct 28th, 2015

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