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OpenStudy (anonymous):
Solve the system using elimination. 3x + 3y = –9 3x – 3y = 21 A. (3, –6) B. (–5, 2) C. (3, 3) D. (2, –5)
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OpenStudy (anonymous):
add to eliminate y solve for x then replace this value of x in the forst equation to find y
OpenStudy (campbell_st):
add the 2 equations to eliminate y 3x + 3y = -9 3x - 3y = 21 ------------ 6x = 12 x = 2 substitute in either equation to find y = -5 ordered pair is (2, -5)
OpenStudy (anonymous):
so the answer is D right
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
thanks can you help me with another one?
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