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using substitution, and by elimination. 6. Solve the following word problems a. Find the value of two numbers if the Elimination b. Alice's school is selling tickets to th school sold 3 adult tickets and 9 studer sold $67 by selling 8 adult and 5 studer student ticket? ethod, then check your solutions. k your solutions: 7. Solving systems of equations in thre variables. -3x +2y+z=-6 x+3y+2z=5 k your solutions. 4x+4y+32=13 a. Choose 1 variable to eliminate from b. Choose 2 equations and eliminate th method. k your solutions