Asked by Princeton
determine the resulting equation if one variable is solved in terms of the other varaiable in one equation and substitute this variable in the other equation.
1.) 4x+y=6
x-2y=15
2.) 2x+y=10
4x+2y=5
1.) 4x+y=6
x-2y=15
2.) 2x+y=10
4x+2y=5
Answers
Answered by
Steve
#1
The first equation says y=6-4x. So, use that in the second equation and you have
x-2(6-4x) = 15
Do #2 in like wise. Or, you can say that
2x = 10-y, so since 4x = 2(2x),
2(10-y)+2y = 5
The first equation says y=6-4x. So, use that in the second equation and you have
x-2(6-4x) = 15
Do #2 in like wise. Or, you can say that
2x = 10-y, so since 4x = 2(2x),
2(10-y)+2y = 5
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