### Home > GB8I > Chapter cc46 > Lesson cc46.2.3 > Problem 6-75

6-75.

Rianna thinks that if *a* = *b *and *c* = *d*, then *a* + *c* = *b* + *d.* Is she correct? Homework Help ✎

If you add the same amount to both sides of the equals sign, then the equation remains true.

Adding *c* to one side is the same as adding *d* to the other because *c* and *d* are equal.

Therefore, the equation ( *a* + *c* = *b* + *d* ) is correct.