X+4y=8 and -x-4y=-8 does it have a no solution, has an unique solution, or does it has infinity solutions. must satisfy the following equation.

Apackage of bacon holds 15 strips of bacon. the pancake house uses 17 packages of bacon in the morning and 21 packages in the afternoon. how many more strips were used in the afternoon than the morning?

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jamie pay at the end?

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?