Respuesta :

sitisyazana

Answer:

r=-7

Step-by-step explanation:

[tex]15r - 11r = - 20 - 8[/tex]

[tex]4r = - 28[/tex]

[tex]r = - 28 \div 4 = - 7[/tex]

cduesburyl16

Answer:

r= -7

Step-by-step explanation:

15r+8=11r-20 (minus 11r from both sides)

4r+8=-20 (minus 8 from both sides)

4r = -28 (divide both sides by 4)

r= -7