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OpenStudy (anonymous):
The sum of two numbers is 51. Their difference is 13. What is the smaller of the two numbers? A. 18 B. 19 C. 20 D. 21
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hero (hero):
x + y = 51 x - y = 13 Solve the system
OpenStudy (radar):
x+y=51 x-y=13 -------- 2x = 64 x=32 y=51-32=19
OpenStudy (radar):
Choice B
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