how would you find the value of b and c using substitution? The equation is 2=4+b+c-3

You need a second equation with these two variables to do the substitution method. Repost with adequate data.

Assume a value of b and calculate the corresponding c with the formula given, or vice versa.

Your formula can be simpliied to:
b + c = 1

c = 1 - b

To find the values of b and c using substitution, you need to substitute the given equation into the expression. Let's start with the equation:

2 = 4 + b + c - 3

Step 1: Simplify the equation by combining like terms.
The terms "4" and "-3" can be combined to give "1".

2 = 1 + b + c

Step 2: Isolate the variables on one side of the equation.
Subtract 1 from both sides of the equation.

2 - 1 = 1 - 1 + b + c
1 = b + c

So, the equation 1 = b + c represents a relationship between the variables b and c. To find the specific values of b and c, you would need additional information or equation(s) involving these variables.