Multiply Both Sides 3
Substitution 2
Substitution 7
Substitution 3
Algebra Square Sum

Proof: Substitution 3

Let's prove the following theorem:

if the following are true:
  • a = b + c
  • d = c

then a = b + d

Proof:

View as a tree | View dependent proofs | Try proving it

Given
1 a = b + c
2 d = c
Proof Table
# Claim Reason
1 c = d if d = c, then c = d
2 a = b + d if a = b + c and c = d, then a = b + d
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