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Mathematics 21 Online
OpenStudy (anonymous):

Solve each system of equations by using addition to eliminate one of the variables . check . PLS SHOW WORK LOL . x+y=12 x-y=4 A+b=13 a-b=5 R+s=6 r-s=-10 3x+y=16 2x+y=11 x+y=10 x-y=0

OpenStudy (bee_see):

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