Respuesta :

Answer:

r=(

Step-by-step explanation:

  • Solving: 21+3r=48

Solving for variable 'r'

Move all terms containing r yo the left, all other terms to the right.

Add '21' to each side of the equation

21+ -21+3r= 48+ -21

Combine like terms:

21+ -21=0

0+3r =48 + -21

3r= 48+ -21

Combine like terms: 48+ -21 =27

3r=27

Divide each side by '3'.

r=9

Simplifying:

r=9

HerecomesDATBOI09

Answer:

r= 9

Step-by-step explanation:

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