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Mathematics 15 Online
OpenStudy (anonymous):

Solve the system of equations by the addition method. Choose one answer. a. (4, 9) b. (9, 4) c. infinite number of solutions d. no solution

OpenStudy (anonymous):

OpenStudy (unklerhaukus):

4x+y=25 (1) 4x-y=7 (2) adding equations (1) & (2) together 8x=32 x=4 subbing this into (1) 4(4)+y=25 16+y=25 y=9 so the solution to the system is (x,y)=(4,9)

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