Question

A4,urgent!!Dau coroana!!!!​

Answer 1

$\it |y-2x-7|\leq3 \Rightarrow -3\leq y-2x-7\leq3\ \ \ \ \ (1)\\ \\ |4-3y|\leq2 \Rightarrow -2\leq4-3y\leq2 \ \ \ \ \ (2)\\ \\ \\ Din\ (1),\ (2),\ prin\ adunare,\ avem:\\ \\ \\ -5\leq-2y-2x-3\leq5|_{+3} \Rightarrow -2\leq-2x-2y\leq8|_{:(-2)} \Rightarrow-4\leq x+y\leq1$