Yahoo Answers: Answers and Comments for Solve by substitution or addition? [Homework Help]
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From Anonymous
enAU
Fri, 24 Jan 2020 17:06:17 +0000
3
Yahoo Answers: Answers and Comments for Solve by substitution or addition? [Homework Help]
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https://au.answers.yahoo.com/question/index?qid=20200124170617AASO6IR
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From Michael: Solving by adding the equations:
x + 3y = 1...
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Fri, 24 Jan 2020 17:50:12 +0000
Solving by adding the equations:
x + 3y = 15
2x  3y = 3
–––––––––––
3x + 0y = 18
3x = 18
Divide both sides by 3
x = 6 <––––––
Substitute x = 6 into
x + 3y = 15
6 + 3y = 15
subtract 6 from both sides
3y = 9
divide both sides by 3
y = 3 <–––––

From David: By addition 3x = 18 and so x = 6 and by substi...
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Sat, 25 Jan 2020 10:35:54 +0000
By addition 3x = 18 and so x = 6 and by substitution y = 3

From oldprof: By "addition" simultaneous solution:...
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Fri, 24 Jan 2020 17:48:12 +0000
By "addition" simultaneous solution:
x + 3y = 15
2x 3y = 3 add these two equations together.
3x + 0 = 18
x = 6; so that 3y = 15  6 = 9 and y = 3
x = 6; y = 3 ANS

From lenpol7: By Substitution
x = 15  3y
Hence 2(15  3y) ...
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Fri, 24 Jan 2020 17:23:24 +0000
By Substitution
x = 15  3y
Hence 2(15  3y)  3y = 3
30  6y  3y = 3
30  9y = 3
9y = 27
y = 3
Hence
x + 3(3) = 15
x + 9 = 15
x = 6

From Anonymous: If you have to ask strangers online how do you...
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Fri, 24 Jan 2020 17:09:53 +0000
If you have to ask strangers online how do you expect to pass a test? Talk to your teacher after class and tell him/her you do not understand. That is what a teacher is for, to TEACH you.