Evaluate the expression;
[tex]x(7-2y)[/tex]Where x = 5 and y = -4,
The expression becomes
[tex]\begin{gathered} =5(7-2\lbrack-4\rbrack) \\ =5(7-\lbrack-8\rbrack) \\ =5(7+8) \\ =5(15) \\ =75 \end{gathered}[/tex]You simply substitute for the values of 5 in place of x, and -4 in place of y
