Problem 1:
1. distribute the 4 to (x-3)
2. 2x-6+4x-12
3. Combine like terms; 6x-18
Problem 2:
1. Combine the equations; 10w+120+45w+25
2. Combine like terms; 55w+ 145
Problem 3:
1. Distribute the - to the g+11
2. -2g+7-g-11
3. -3g-4
Problem 4:
1. 10L+w