Write and describe the four steps for using the linear combination method to solve a system of equations, use complete sentences. 1. arrange. 2. multiply if needed. 3. add or subtract and solve. 4. find the other variable. always check solve this system using the linear combination method. show your work and explain each step. 2x + y = 8 x − y = 4

addition

step-by-step explanation:

hello! just here for points! though i wish i knew!

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."