Number sentence of different between 966 and 406

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

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?

Need on this geometry question. explain how you did it.