1. m∠ELG = 124
1. given
2. m∠ELD = 2x
2. given
3. ∠ELG and ∠ELD are a linear pair.
3. definition of a linear pair
4. m∠ELD + m∠ELG = 180
4. ♣
5. 2x + 124 = 180
5. substitution
6. ♦
6. subtraction property
7. x = 28
7. division property