Final answer:
To find if a number is a solution to a given set of linear equations and inequalities, substitute the number into each equation or inequality and check if the statements are true. Mark 'Y' if the number satisfies the equation or inequality, or 'N' if it doesn't.
Step-by-step explanation:
The student is working with linear equations and inequalities to check if given numbers are solutions to them. The question involves substituting the numbers 5, 10, 15, and 20 into the equations and inequalities to determine if they satisfy them.
To determine if a number is a solution, you would typically substitute the number into the equation or inequality in place of the variable and see if the mathematical statement is true. For example, if you have the equation y = 6x + 8, and you want to check if 10 is a solution, you would substitute x with 10, resulting in y = 6(10) + 8, which simplifies to y = 68.
If after the substitution the equation or inequality holds true, then the number is a solution, denoted by 'Y' for yes. If it does not hold true, it is not a solution, denoted by 'N' for no.