beccahayes1 beccahayes1
  • 21-04-2021
  • Mathematics
contestada

solve the simultaneous equations
8x+3y=45 2x+3y=27

Respuesta :

Muscardinus Muscardinus
  • 26-04-2021

Answer:

x = 3 and y = 7

Step-by-step explanation:

Given that,

8x+3y=45 .......(1)

2x+3y=27 ........(2)

We need to solve equations (1) and (2)

Multiply equation (2) by 4.

8x+12y=108 .....(3)

Subtract equation (1) from (3).

8x+12y-(8x+3y)=108-45

12y-3y = 63

9y = 63

y = 7

Put the value of y in equation (1).

2x+3(7)=27

2x+21 = 27

2x = 27-21

2x = 6

x = 3

So, the values of x and y are 3 and 7 respectively.

Answer Link

Otras preguntas

Summarize the role of women by the late 1800s, what challenges did families face?
why did the middle colonies have such a diverse European population?
Round 9.42 to one decimal place
what times what equals 40
Which important document was signed by King John in the 1200s granting certain rights to the English people and limiting the king’s power? A. the Charter of Eng
Which form of characterization is most often used in drama?
A 4-watt night light is left on for 8 hours each night. How much work dies it do per night
which of the following represents the most accurate estimation of 54-16?=
Shakespeare wrote plays and poems over a ____ year career. ten twenty thirty forty
Conducting experiments, using inquiry, and asking testable questions are processes that are used by