Question

solve system graphically. be sure to check your solution. if a system has infinite number of solutions, use set builder notation to write the solution det. if a system as no solution, state this. a=1+b b=5-2a

Answer 1

b = 5 - 2 (1+b)
b = 5 - 2 - 2 b
3 b = 3
b = 1
a = 1+b = 2

these are straight lines
choose some values for b and find a for each equation then find intersection at a = 2 and b = 1