2112megadeath
2112megadeath 2112megadeath
  • 20-06-2017
  • Mathematics
contestada

Solve the system by substitution.

y = 2x
3x + 2y = 21

Respuesta :

mergl
mergl mergl
  • 20-06-2017
y=2x
3x+2y=21
3x+2(2x)=21
3x+4x=21
7x=21
x=3
y=2(3)
y=6
Answer Link

Otras preguntas

are 2x+y=5 and y=-1/2x+1 parallel perpendicular or neither
A car with mass 450kg has a Kenetic energy of 16256 J. what is the speed of the car ?
Molly rewrote the equation as shown: -50 + 11 = 8 - 3d -5d + 11 + 3d = 8 - 30 + 3d Which property did she use to rewrite the equation? O addition property of eq
Write an equation in standard form that is parallel to the line y = 2x - 1 that passes through the point (1, 2). 2x - y = 0 O x - 2y = 1 0 + -2x + y = 0 O x + y
Rewrite the expression using rational exponents.
What is the mathematical relationship between wavelength and velocity?
the electricity goes out in a house the temperature in the house changes by -8 F in 4 hours on average, by how many degrees is the temperature changing per hour
You and your friend go to tacos Galore for lunch. You order 3 soft tacos and 4 burritos and your bill comes out to $18.00. Your friend's bill is $10.00 for two
Please help me please
If you’re correct I’ll give u brainlist!!