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OpenStudy (anonymous):
Solve the system by substitution. y = 2x 3x + 2y = 21 A. x = 3, y = 6 B. x = 6, y = 3 C. x = 3, y = –6 D. x = –6, y = 3
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OpenStudy (littlebird):
y=2x 3x+2(2x)=21 substitution 3x+4x=21 7x=21 x=3 Now use the first equation again y=2x y=2(3) y=6
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