Answer:
1.- m = 13
2.- [tex]x<-\frac{2}{3}[/tex]
3.- y = 3
Step-by-step explanation:
In all cases we need to start with an equation or an inequality and slove for the variable:
Case 1. : 2 m - 13 = m + 3
[tex]2m-13=m+3\\2m-m=3+13\\m=16[/tex]
Case 2. : 2 x + 1 > 8 x + 5 + 20
[tex]2x+1>8x+25\\1-25>8x-2x\\-24>6x\\-4 >x\\x<-4[/tex]
Case 3. : 9 - y = 2 y
[tex]9-y=2y\\9=2y+y\\9=3y\\y=3[/tex]
