if a+3b=13 and a+b=5, the value of b is
a 4.5
b 7
c 1
d 4
use substitution
change the second to a = 5-b
now sub that back into the first
let me know what you got for b.
i got my answer as 1 (C).is that correct !!!
no
from the second: a = 5-b
that into the first:
a+3b=13
(5-b) + 3b = 13
2b = 13-5
2b=8
b = 4
To find the value of b, we will use the given system of equations and solve for b.
Let's start by subtracting the second equation (a+b=5) from the first equation (a+3b=13). This will help us eliminate the variable 'a' and solve for 'b'.
(a+3b) - (a+b) = 13 - 5
a - a + 3b - b = 8
2b = 8
To isolate 'b', divide both sides of the equation by 2:
2b/2 = 8/2
b = 4
Therefore, the value of b is 4.