xxalinax50
xxalinax50 xxalinax50
  • 01-09-2020
  • Mathematics
contestada

Solve for the variable!
1. 2x + 21 = 40
2. 4x - 12 = 3x + 9
3. 3(x -1) + 2 = 7x

Respuesta :

Annder
Annder Annder
  • 01-09-2020

Step-by-step explanation:

1. 2x + 21 = 40

2x = 40 - 21

2x = 19

x = 19/2 = 9.5

2. 4x - 12 = 3x + 9

4x - 3x = 9 + 12

x = 21

3. 3x - 3 + 2 = 7x

3x - 1 = 7x

-1 = 7x - 3x

-1 = 4x

4x = -1

x = -1/4

= - 0.25

Answer Link

Otras preguntas

What is Sir Francis Drake hardships
How many minutes are in 36 hours?
is it possible for a distance versus-time graph to be a vertical line?
is it possible for a distance versus-time graph to be a vertical line?
What are two different ways to describe and label the layers of the Earth?
What three islands are located off the East African coast
two identical freight cars roll without friction towards each other on a level track. one car rolls 2 m/s the other 1 m/s. after the cars collide they couple an
A child is standing across the street from his apartment . His mother is on their balcony . The angle of elevation between the child's eyes and his mothers eyes
Trying to translate word problems. Five times the sum of 3 and twice some number is 70. what is the number?
If the speed of an object is tripled, its kinetic energy will be