How do you solve these problems?

a. (2/7)x + 5= -21 and

b. 1/2(18x-2)=0

Geometry? i am really bad at math and have dyscalcullia. .

An apartment has a replacement cost of $950,000 and contents valued at $1,450,000. it has a classification of a and a territory rating of 3. find the annual premium a) $10,185 b) $9,230 c) $3,155 d) $13,830

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10