suareza36 suareza36

20-01-2016
Mathematics

contestada

Solve each system of liner equations

y=2x+1
x+2y=17

pls help!

Respuesta :

Billymkhoi Billymkhoi

20-01-2016

Plug y=2x+1 into x+2y=17, we have:
x+ 2(2x+1)= 17
⇒ x+ 2*2x+ 2*1= 17 (distributive property)
⇒ x+ 4x+ 2= 17
⇒ 5x= 17-2
⇒ 5x= 15
⇒ x= 15/5
⇒ x= 3

y= 2x+1= 2*3+1= 7

Final answer: x= 3, y= 7~

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