Norris123
Norris123 Norris123
  • 14-07-2020
  • Mathematics
contestada

x+2y=8 under it is x-3y =6 solve it using simultaneous equation,substitution method.​

Respuesta :

devishri1977
devishri1977 devishri1977
  • 14-07-2020

Answer:

Step-by-step explanation:

x +2y = 8  ----- (I)

 x = 8 - 2y

x - 3y = 6 -------(II)

Substitute x = 8 - 2y in equation (II)

8 - 2y - 3y = 6    {add like terms}

8 - 5y = 6

Subtract 8 form both sides

 -5y = 6- 8

 -5y = -2

Divide both sides by -5

 -5y/-5 = -2/-5

y = 2/5

Substitute y = 2/5 in equation (I)

[tex]x+2*\frac{2}{5}=8\\\\x+\frac{4}{5}=8\\\\x=8- \frac{4}{5}\\\\x=\frac{8*5}{1*5}-\frac{4}{5}\\\\x=\frac{40}{5}-\frac{4}{5}\\\\x=\frac{36}{5}[/tex]

x = 36/5

Answer Link

Otras preguntas

Please answer at least one of these questions!! Please state which question you answered too. Will give brainliest!
Formal education, which involves instruction by specially trained teachers.
why is the demand for labor called a dervied demand
I WILL AWARD BRAINLIEST!!! PLEASE HELP!!! Find the areas of the trapezoids.
Hadley has a 1/2 kilogram of popcorn. She divides the popcorn into 3 equal bags. How many kilograms of popcorn are in each bag?
Please go answer my recent questions ASAP.
helppppppppp pllllzzzz​
how long should you wait before exercising after you eat​
Which of the following groups in the Domain Archaea require high salt concentrations for survival? hyperthermophiles halophiles Archaezoa methanogens
Simplify the following expressions a + a + a 3d + 2b – 2d – 7b b x b x b x b 3c x 2e x 4c can someone plz help me thanks