AEB047
How do you find a b and c for
a=-b+3
a+2c=10
-b+c=3
Delete
Share
This Question is Closed
jim_thompson5910
Best Response
You've already chosen the best response.
1
Solve -b+c=3 for c to get
c = b+3
jim_thompson5910
Best Response
You've already chosen the best response.
1
Now plug a = -b+3 into the second equation to get
a+2c=10
(-b+3)+2c=10
-b+3+2c=10
Then plug in c = b+3 to get
-b+3+2c=10
-b+3+2(b+3)=10
Solve this last equation for b. Tell me what you get.
AEB047
Best Response
You've already chosen the best response.
0
What do you plug c=b+3 into?
jim_thompson5910
Best Response
You've already chosen the best response.
1
into -b+3+2c=10
jim_thompson5910
Best Response
You've already chosen the best response.
1
notice how I replaced 'c' with b+3
AEB047
Best Response
You've already chosen the best response.
0
thanks
AEB047
Best Response
You've already chosen the best response.
0
b=1?
jim_thompson5910
Best Response
You've already chosen the best response.
1
yes good
jim_thompson5910
Best Response
You've already chosen the best response.
1
you can now use this to find 'a' and 'c'
AEB047
Best Response
You've already chosen the best response.
0
a=2
AEB047
Best Response
You've already chosen the best response.
0
c=4
jim_thompson5910
Best Response
You've already chosen the best response.
1
all 3 are correct
AEB047
Best Response
You've already chosen the best response.
0
thanks!