Which equation can you use to find the value of b?
A.7+b+4=15
B. 1+5+b=15
C. b=2+4+15
11-14=b
15-6=b
6-15=b.
Do the problems, :)
All of A, B and C.
I'll solve one of them as an example.
A.7+b+4=15
subtract 7 and 4 from each side
7-7 + b + 4 - 4 = 15 -7 -4
0 + b + 0 = 4
b=4
To find the value of b, you need to isolate it on one side of the equation by performing the same mathematical operation on both sides of the equation.
Let's analyze the given options:
A. 7 + b + 4 = 15
To isolate b, we need to get rid of the constants (7 and 4) on the left side. We can do this by subtracting them from both sides of the equation:
7 + b + 4 - 7 - 4 = 15 - 7 - 4
Simplifying it further:
b = 15 - 7 - 4
b = 4
Therefore, the value of b for option A is 4.
B. 1 + 5 + b = 15
To isolate b, we need to get rid of the constants (1 and 5) on the left side. We can do this by subtracting them from both sides of the equation:
1 + 5 + b - 1 - 5 = 15 - 1 - 5
Simplifying it further:
b = 15 - 1 - 5
b = 9
Therefore, the value of b for option B is 9.
C. b = 2 + 4 + 15
Option C already gives the expression for b, so no further simplification or calculation is required.
Therefore, the value of b for option C is 21.
In conclusion, to find the value of b, you should use option B where b = 9.