Given: AB = 3x + 2; BC = 4x + 8; AC = 38 Prove: x = 4
Reason
Statements
1. AB = 3x + 2; BC = 4x + 8;
Given
AC = 38
2. AB + BC = AC
3. 3x + 2 + 4x + 8 = 38
4. 7x + 10 = 38
2. Segment Addition Postulate
3. Substitution Property of Equality
4. Combining Like Terms
5. Addition Property of Equality
6. Division Property of Equality
5. 7x = 28
6. X=4
On which line, did Daniel make his error?
line 3
line 5
line 2