Simultaneous equation substitution method x+y=3 and 5x_5y=1
2 answers
If anyone needs help from me please note that my skill level is 8th grade and less.
assume you mean
x+y=3 and 5x-5y=1
so you can say y = 3 - x and substitute that in the second equation
5 x - 5 (3-x) = 1
5 x - 15 + 5 x = 1
10 x = 16
x = 1.6
then y = 3 - 1.6 = 1.4
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check
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5 x = 8
5 y = 7
sure enough 8 - 7 = 1
x+y=3 and 5x-5y=1
so you can say y = 3 - x and substitute that in the second equation
5 x - 5 (3-x) = 1
5 x - 15 + 5 x = 1
10 x = 16
x = 1.6
then y = 3 - 1.6 = 1.4
===================
check
============
5 x = 8
5 y = 7
sure enough 8 - 7 = 1
2 answers