MinnieTewksbury497 MinnieTewksbury497

03-06-2015
Mathematics

Answered

3x + y = 19 , and x + 3y = 1. Find the value of 2x + 2y

A20
B18
C11
D10
E5

Verified Answer :

04-06-2015

\(3x+y=19 \\ x+3y=1 \\ \\ \hbox{add the sides of the equations:} \\ 3x+x+y+3y=19+1 \\ 4x+4y=20 \\ \\ \hbox{divide both sides by 2:} \\ 2x+2y=10\)

The answer is d. 10.

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