chapter - 2 - basic algebra chapter-2 - basic algebra - ex 2.1 -or- chapter-2 - basic algebra - ex 2.2 -or- chapter-2 - basic algebra - ex 2.3 -or- chapter-2 - basic algebra - ex 2.4 -or- chapter-2 - basic algebra - ex 2.5 -or- chapter-2 - basic algebra - ex 2.6 -or- chapter-2 - basic algebra - ex 2.7 -or- chapter-2 - basic algebra - ex 2.8 -or- chapter-2 - basic algebra - ex 2.9 -or- chapter-2 - basic algebra - ex 2.10 chapter-2 - basic algebra - ex 2.11 -or- chapter-2 - basic algebra - ex 2.12 -or-