Write a comparison problem you can solve using addition or subtraction. draw a bar model to represent the situation. describe how the information in the bar model is related to the problem.

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

Im gonna fail 7th grade selective breeding 1. creates offspring which are genetically identical to the parent 2. is the process of breeding only organisms with desirable traits 3. involves the removal of the nucleus of a cell 4. combines traits from organisms of different species

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827