For the following system if you isolated X in the second equation to use the substitution method what expression would you substitute into the first equation? 2x+y= 8-х – Зу = -12A. зу + 12B.-3y + 12C.зу – 12D.-3y - 12
Accepted Solution
A:
Option A. зу + 12 is the right answerStep-by-step explanation:The substitution method consists of finding the value of a variable from one equation and then putting it into another equation to find the value of other variable.Given equations are:[tex]2x+y=8\\-x-3y=-12[/tex]We have to isolate x in the 2nd equation[tex]-x-3y=-12[/tex]Multiplying equation by -1[tex]x+3y=12[/tex]Subtracting 3y from both sides[tex]x+3y-3y=12+3y\\x=12+3y[/tex]Hence,Option A. зу + 12 is the right answerKeywords: linear equations, VariablesLearn more about linear equations at:brainly.com/question/11280112brainly.com/question/11286417#LearnwithBrainly