algebra
posted by Cassie on .
solve by the elimination method
3r  7s =29
7r + 3s = 29
What is the solution of the system?
Type an ordered pair. Type an interger or a fraction or type N if there is no solution or type 1 if there are infinitely many solutions.

This can be solved as there are two unknowns and two equations.
I would multiply the top by 3 and the bottom by 7 and then add the two equations together.
9r21s=87
49r+21s=203
add
58r=290
r=5
subsiitute in the first equation
157s=29
7s=14 so s=2