Could someone explain this to me, idk if my answers are right

John bought 2 horses at rs 20000 each

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.