Ldemeter Ldemeter
  • 04-06-2018
  • Mathematics
contestada

Solve a system of equations algebraically.

x + y = 3
3x - 2y = 4

Respuesta :

yellowyarn2003 yellowyarn2003
  • 04-06-2018
x + y = 3
x = -y + 3

3(-y + 3)  - 2y = 4
-3y + 9 - 2y = 4
-5y = -5
y = 1

x + 1 = 3
x = 2

x = 2, y = 1
Answer Link
zcanty05 zcanty05
  • 04-06-2018
One way to figure this out or to solve this is:

x=2
y=1

x+y=3
2+1=3

3x-2y=4
3 multiplied by 2= 6
2 multiplied by 1=2
6-2=4
3 times 2 minus 2 times 1 equals 4

Hope this helps!
Answer Link

Otras preguntas

help i need it now plss[tex]either...or \: \\ neither...nor \\ \\not \: only...but \: also \\both... and \\ whether...or[/tex]​
Drag each label to the correct location on the diagram. Label the parts of the brain.
Differences between the chromosphere and corona of the sun
Drinking alcohol during pregnancy negatively impacts development of the fetus because
In the play, the setting helps to reveal how each brother feels about moving. Write a paragraph supporting this statement. Cite at least two pieces of evidence
Read the excerpt from "Digging." The coarse boot nestled on the lug, the shaft Against the inside knee was levered firmly. Which idea is typically associated w
does Spain have organizational culture (explain pls)​
Need help! :(((((((((((((((((((((((((
can anyone help me with this with easy tricks We also have to find volume I have exams tommorow ​
How many NH3 molecules are produced by the reaction of 4.0 mol of Ca(OH)2 according to the following equation: (NH4)2SO4 + Ca(OH)2 → 2 NH3 + CaSO4 + 2 H₂O