Question

help to solve this equations​

Answer 1

Step-by-step explanation:

11. 10 (y-4)-2 (y-9)-5 (y+4)=0

10y - 40 - 2y + 18 - 5y - 20=0

10y-2y-5y-40-20+18 =0

3y-42=0

3y=42

y=42/3

y=14

12. 2m+5/3=3m-5

2m+5=3m-5×3

2m-3m = -5×3 +5

-m = -15+5

-m = -10

10=m