Simultaneous equations can have multiple solutions, but the specific equations presented, 4x + 3x = 28 and 2x + 5x = 42, lead to a single variable scenario. The discussion highlights the importance of correctly interpreting the equations, as the original equations lack a second variable. When reformulated as 4x + 3y = 28 and 2x + 5y = 42, the equations can be solved using the Gaussian method. However, if taken literally, the first equations suggest no solution exists unless the constants are equal. Proper formulation is crucial for determining the nature of solutions in simultaneous equations.