SOLUTION: 3x+2y=8 and y=x-1, then x=

Algebra ->  Inequalities -> SOLUTION: 3x+2y=8 and y=x-1, then x=      Log On


   

Question 126731: 3x+2y=8 and y=x-1, then x=
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
3x+%2B+2y+=+8 and y+=+x+-+1
Substitute y in the 2nd equation
for y in the 1st
3x+%2B+2%28x+-+1%29+=+8
3x+%2B+2x+-+2+=+8
5x+=+10
x+=+2
check:
y+=+x+-+1
y+=+2+-+1
y+=+1
3x+%2B+2y+=+8
3%2A2+%2B+2%2A1+=+8
6+%2B+2+=+8
OK