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

German questions help pwease?
7 (2x-3) x =9 2. 3(y+11) y=12​
Match each pair of angle measures of a triangle with the remaining angle measure
Please help ASAP!!!! Explain how mature ecological communities support biodiversity. THANK YOU IN ADVANCE!!❤️
How does Machiavelli work to achieve his secondary purpose— to inform his readers?
1) Will the leaves of the plant wilt after one month? Give a reason.2) Predict what will happen to the plant after three month. Why?​
In many cities you can stay at a Holiday Inn in the downtown area, in a suburban community, or near the airport. These Holiday Inn establishments are examples o
How did the US rebuild Japan into a Market based democracy after WW2?
In parallelogram RSWY, find m
solve the following for y: -6 +2y = 8