SOLUTION: I'm 46 years old and working on refreshing my skills. How do I solve this using the substitution method? x+3y=23 3x-2y=3 Thanks x+3y=23 ...(1) 3x-2y=3 ...(2) fr

Algebra ->  Graphs -> SOLUTION: I'm 46 years old and working on refreshing my skills. How do I solve this using the substitution method? x+3y=23 3x-2y=3 Thanks x+3y=23 ...(1) 3x-2y=3 ...(2) fr      Log On


   

Question 459611: I'm 46 years old and working on refreshing my skills. How do I solve this using the substitution method?
x+3y=23
3x-2y=3
Thanks
x+3y=23 ...(1)
3x-2y=3 ...(2)
from eq(1)
x=23-3y
now substituting the value of x in eq (2)
3(23-3y)-2y=3
69-9y-2y=3
-11y=-66
y=6
and hence x=23-18=5
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