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OpenStudy (anonymous):
3x + y = 19 , and x + 3y = 1. Find the value of 2x + 2y ?
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OpenStudy (kc_kennylau):
What do you get when you add those two equations together?
OpenStudy (kc_kennylau):
Divide the sum by 2 :D
OpenStudy (haseeb96):
3x+y=19......eq1 x+3y=1............eq2 adding them 4x+4y=20 2 common from both sides 2(2x+2y)=2(10) 2 cancel from both sides 2x+2y =10 this is the correct answer
OpenStudy (anonymous):
2x+2y=10 So that means 10 is the correct answer.
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