Please help I will give brainliest ive tried but it says it’s wrong please help

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

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Aphrase is shown read the phrase and give me the answer