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

rewrite the expression without using grouping symbols. -6(8+12)
do you know 3 prime numbers that equal 32
Why did the Virginia Company give settlers the right to self-government?
You bought a car for $25,000. You have owned it for one year, and it is now worth $21,000. What is the percent decrease in your car's value?16%19%84%119%
You bought a car for $25,000. You have owned it for one year, and it is now worth $21,000. What is the percent decrease in your car's value?16%19%84%119%
Why did the Virginia Company give settlers the right to self-government?
what times what equal 16?
The cost of 5 similar digital cameras and 3 similar video cameras is 3213. Each video camera costs 4 times as much as each digital camera. John buys a digital c
50 is 40% of what number?
You bought a car for $25,000. You have owned it for one year, and it is now worth $21,000. What is the percent decrease in your car's value?16%19%84%119%