Substitution Math Example 3

Follow the full solution, then compare it with the other examples linked below.

Example 3

easy
Evaluate a+2ba + 2b when a=5a = 5 and b=−1b = -1.

Solution

  1. 1
    Substitute: 5+2(−1)=5−2=35 + 2(-1) = 5 - 2 = 3.
  2. 2
    Replace each variable with its value and compute.

Answer

33
Substitute the given values for each variable and follow the order of operations.

About Substitution

Replacing every occurrence of a variable or sub-expression with an equivalent value or expression throughout a problem.

Learn more about Substitution →

More Substitution Examples

Example 1 easy

If [formula] and [formula], find [formula].

Example 2 medium

If [formula] and [formula], use substitution to solve for [formula].

Example 4 medium

If [formula] and [formula], find [formula].

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