templekendaria1 templekendaria1
  • 18-06-2018
  • Mathematics
contestada

2x - 4y = 12
3x - 5y = 20

Respuesta :

Аноним Аноним
  • 18-06-2018
You multiply the first equation by 3 and the second one by 2:
3*(2x - 4y = 12) = 6x - 12y = 36
2*(3x - 5y =20) = 6x - 10y = 40
Then use elimination:
6x - 12y = 36
- (6x - 10y = 40)
= -2y = -4
Solve:
y = 2
Then, plug 2 into the first equation and solve:
2x - 4(2) = 12
2x - 8 = 12
2x = 20
x = 10
There is the answer, x = 10 and y = 2.

Answer Link

Otras preguntas

Elin wants to retire in 20 years when she turns 60. Elin wants to have enough money to replace 120% of her current income less what she expects to receive from
The diagram below shows the relative positions of Earth and the Sun at a certain time of the year. Based on the diagram, which season is occurring in the South
What is -3 1/2+5 3/5
What are everyday monsters
You are in the park playing with your children when you see that your friend is screaming for help. Her toddler has fallen and there is a stick lodged in his ey
How many modes does the following data set have? 5, 5, 6, 7, 8, 12, 12, 12, 150, 150, 150
If you add 12 marshmallows to each of 5 bags of marshmallows, and each bag started with the same number of marshmallows, the total number of marshmallows is giv
X/7 ≥ -6 your answer must be simplified
Which is best strategy for avoiding chronic dieases caused by a high-calorie diet?
Which of the following is something that probably would NOT be studied in a lab? A. the growth of mice B. the planet Neptune C. how chemicals react D. how a