Seudónimo Seudónimo
  • 02-02-2016
  • Mathematics
contestada

Solve 2a + 21 = 8a - 9, step by step

Respuesta :

Аноним Аноним
  • 02-02-2016
2a + 21 = 8a - 9

Combine like terms. 

2a + 21 = 8a - 9
-2a          -2a

21 = 6a - 9 
+9          +9

30 = 6a
6a/6 = 30/6
a = 5

Answer: a = 5
Answer Link

Otras preguntas

The populations of deer and wild boars on an island in the Pacific Ocean were recorded over a period of five years. The results are shown in the table. Which st
Find the value of x.
Most body cells undergo mitosis, but there are a couple of tissues in the body whose cells do not. Name one of those types of cells. HELP ASAP
How atomic radius changes across a period and down a group in the periodic table?
what the name of project in san nicolas gapan city and the description​
How are the Cuban, Mexican, and Brazilian economies different
HEy, CAn YOu HElp ? :) Plssss (picture below) solve for #5
20 cm 30 centimeters 2. Find the area of the shaded region above.
Mayonnaise is kept in the refrigerator. How do i write that in passive voice?
Kaylani is going to make a blanket by sewing a 4-foot long piece of ribbon along the diagonal of a piece of rectangular fabric. She wants the length of the blan