1. a number is subtract from 20 the result is 10 what is the number

Question

2.i multiply a number by 10 and where 12 is remove the result is 18 what is the number 7

Answer 1

solve these equations:

1.
20-x = 10

2.
10x - 12 = 18

at the end you say "what is the number 7" ?????