The system: x + 1 = 3 y 3 x - 4 = 5 y - 1 ------------------------ We can use the substitution: x = 3 y - 1 3 * ( 3 y - 1 ) - 4 = 5 y - 1 9 y - 3 - 4 = 5 y - 1 9 y - 7 = 5 y - 1 9 y - 5 y = 7 - 1 4 y = 6 y = 6 : 4 y = 1.5 x = 3 * 1.5 - 1 x = 4.5 - 1 x = 3.5 Answer: ( 3.5, 1.5 )
