Question: Let a=8 and b=8 in the linear system below. Solve the linear system for y using the method of substitution or the method of addition/elimination

Let a=8 and b=8 in the linear system below. Solve the linear system for y using the method of substitution or the method of addition/elimination (your answer must be correct to 2 decimal places) {2x5y=a3x+y=b Which of the following augmented matrices corresponds to the linear system {5y7x=22x3y=1[217253][125273][725321][527321][572321] Which of the linear systems below can be obtained from the given system using only valid row operations (hint: there are 3 correct answers) {a+2b=1a+b=7{a+2b=13b=8{a+10b=1a+5b=7{7a+14b=7a+b=7{a+2b=6a+b=12{3a=13a+b=7

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