angelliu11
angelliu11 angelliu11
  • 10-08-2017
  • Mathematics
contestada

2x + 7y = 8
3x + 2y = -5
Solve algebraically.

Respuesta :

irspow
irspow irspow
  • 10-08-2017
3(2x+7y=8)-2(3x+2y=-5)

6x+21y-6x-4y=24+10

17y=34

y=2, which makes 2x+7y=8 become

2x+7(2)=8

2x+14=8

2x=-6

x=-3

So the solution to the system of equations is the point (-3, 2)

Answer Link

Otras preguntas

why do you think a mixed economy makes sense for a democracy with a diverse population with many competing interests?
10. Do you think that John and Elizabeth have had problems before? Give evidence from the text. 11. What does the word "forbid" mean in the line "You heard me f
|x+1|+|3x-2|=2 Solve each equation
The odor of a food influences how something tastes to an individual. please select the best answer from the choices provided t f
Suppose that a code (similar to a postal code) is of the form LDL DLD, where 'L' is an uppercase letter from A to N (i.e., 14 possible letters) and 'D' is a dig
Seventy maths textbooks cost £875. a How much will 25 maths textbooks cost? b How many maths textbooks can you buy for £100?
solve this thank you ​
how role models inspire young people ​
Which of the following DID NOT contribute to the Second Industrial Revolution? O abundant natural resources an expanding labor force O technological advances in
(2x³ - 11x² - 5x+4) ÷ (x²-5x - 5)