pmullin pmullin
  • 07-05-2015
  • Mathematics
contestada

How do I solve this system using substitution: y = x + 4; y = 3x

Respuesta :

Gravityi
Gravityi Gravityi
  • 07-05-2015
you just do 
3x=x+4
subtract x from both sides
2x=4
divide 2 from both sides
x=2
y=2+4
y=6
(x,y)= (2,6)
Answer Link
Panoyin
Panoyin Panoyin
  • 07-05-2015
y = x + 4
y = 3x

 3x = x + 4
- x  - x       
 2x = 4
  2     2
   x = 2
y = x + 4
y = 2 + 4
y = 6
(x, y) = (2, 6)
Answer Link

Otras preguntas

The length of a side of a square is . If the area of the square is 12, find x.
10 interesting questions on plant cells
Find the product for these questions 1.( 2x ) ( 10x )2.  -3m( m + 8 )3. 4d( 2d -9 )4. ( 3x + 4 ) ( x -2 )5. ( 2y -1 ) ( 4y - 3 )
What equipment and “clothing” would be needed to explore the planet Uranus?
Find the product for these questions 1.( 2x ) ( 10x )2.  -3m( m + 8 )3. 4d( 2d -9 )4. ( 3x + 4 ) ( x -2 )5. ( 2y -1 ) ( 4y - 3 )
find the x intercepts of the polynomial function state whether the graph crosses the x axis or touches the x axis and turns around at each intercept      f(x)=2
please help me correct the right choice so that the pronouns agree with the antecedents.1- Each of the horses stood on ( its, their ) hind legs.2) Neither Bob n
PLz help with these questions.For questions 1 and 2 , write each expression using a single exponent.1)   x^9/x^22) h^14/h^5For questions 3 and 4, simplify each
why isn't moon shadows entire family in the us
the product of three and a squared number is twice the sum of the number and four