Math !
1. simplify -14x^3/x^3-5x^4
2. simplify x+7/x^2+4x-21
3. simplify x^2-3x-18/x+3
4. simplify 3/5a multiply by 1/a^2
5. simplify x+2/5x-15 multiply by (10x^2-25x-15)
6. divide (x^2-16/x-1) /x+4
7. divide (x^2+2x+1/x-2)/(x^2-1/x^2-4)
8. divide (24w^10+8w^12)/(5w^5)
9. divide (-5w^10+10w^8+5w^6)/(5w^5)
10. simplify into one fraction (-4x/x+//x+7)

(a) solve h+2/6 = h-3/4(b) solve the following simultaneous equations. 2x = y + 66x - 2y = 13x = ? y = ?

Aphrase is shown read the phrase and give me the answer

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14