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X+2y=14 Y=3x-14 Substitution

X+2y=14 Y=3x-14 Substitution
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1 vote
X+2y=14
Y=3x-14
Substitution

User Liam Bigelow
by
8.4k points

2 Answers

3 votes
X+2y=14, okay so you have to write X+2(3x-14)=14
User Insoo
by
8.4k points
4 votes

\left \{ {{x+2y=14} \atop {y=3x-14}} \right.\\\\Substitution\\\\ x+2(3x-14)=14\\ x+6x-28=14\\ 7x-28=14\ \ \ | add\ 28\\ 7x=42\ \ \ | divide\ by\ 7\\x=6\\ y=3x-14=3*6-14=18-14=4\\\\Solution:\\ \left \{ {{y=4} \atop {x=6}} \right.
User Yonnaled
by
9.0k points
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