sammy5592
Part 1:
Solve the following system of equations. Please show your work to receive full credit.
x - y = 10
2x + y = 2
Part 2:
Explain which method you chose to solve the system and why you felt it was the best choice.
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hartnn
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Add those two equations first and tell me what u get?
Mellissa
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combine like terms first
sammy5592
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3x+y=12
Mellissa
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is that Part 2 part of the equation ?@Sammy5592
sammy5592
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no @Mellissa
shaik0124
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|dw:1346076054334:dw|
Mellissa
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ok @Sammy
shaik0124
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-3y=18
y=-6
x-(-6)=10
x+6=10
x=10-6
x=4
shaik0124
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therefore x=4,y=-6 is answer
sammy5592
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can u write the firsrt 1 out like that
hartnn
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@sammy5592 how did u get 3x+y=12
u should get 3x=12
check again.
shaik0124
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i multiplied first equation by 2 then subtracted from 2nd equation ..this gives y .put y value in any one of the equations u will get x,theefore x,y u got is solution
sammy5592
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no i mean how you did the second equation
shaik0124
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did u got @sammy5592
sammy5592
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???
shaik0124
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did u understand the solution i replied for above problem
sammy5592
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yes
sammy5592
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part 2 ???
shaik0124
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it is substitution method
shaik0124
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it is best bcoz if u find 1 value then automatically it is easy to find another value
sammy5592
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Thanks :)