traynoran2025
traynoran2025 traynoran2025
  • 23-01-2021
  • Mathematics
contestada

does anyone know how to solve 2x+3y=7 and 4x-5y=25 using substitution to solve the system of equations. PLEASE HELP ONLY IF YK IT

Respuesta :

jeremiahkevinm
jeremiahkevinm jeremiahkevinm
  • 23-01-2021

Answer:

Step-by-step explanation:

first, let us mark the two equations as i and ii

2x+ 3y = 7

or, 2x = 7-3y

or, x = (7-3y) ÷ 2.........................(i)

and let 4x-5y= 25............(ii)

Now, put the the value of x from (i) into (ii)

4[(7-3y) / 2] -5y = 25

2(7-3y) -5y = 25

14- 6y - 5y = 25

-11y = 11

y = -1

Now, put y = -1 back in (i)

x = (7-3y)/2

x = 10 /2

x = 5

Answer Link

Otras preguntas

(briefly) define fusion
how to write a story that would be represented by the ratio 1:4
How did the growing wave of immigration affect the rise of political machines? Political bosses gave little help to newly arrived immigrants because they could
(briefly) define fusion
Which British economist believed that competition among businesses is important and that "the market" is driven by self-interest? A. Richard Arkwright B. John K
45% of 20 is what number
(briefly) define fission
Sylvia has 6 fish. Larry has 13 fish. Margo has half of the amount of fish as Sylvia. Write the expression that can be used to find the difference between Larry
What are some advantages and disadvantages of (your) school/school rules? In german, and say what it means too. please.
Which of the following statements about Vietnam is true? A. Hanoi is the main center of Vietnam's marketplace economy. B. Vietnamese farmers have long special