egertonblaze egertonblaze

04-08-2017
Mathematics

contestada

4x - 3y = 17 5x + 4y = 60 x = 2, y = -3 x = 5, y = 8 x = 8, y = 5 x = -8, y = -5

Respuesta :

texaschic101 texaschic101

04-08-2017

4x - 3y = 17.....multiply by 4
5x + 4y = 60 ...multiply by 3
-----------------
16x - 12y = 68 (result of multiplying by 4
15x + 12y = 180 (result of multiplying by 3
-----------------add
31x = 248
x = 248/31
x = 8

4x - 3y = 17
4(8) - 3y = 17
32 - 3y = 17
-3y = 17 - 32
-3y = - 15
y = -15/-3
y = 5

solution is (8,5) <==

Answer Link

Otras preguntas

Which of the following does not have a solution of x ≤ 2? a) x+4 ≤ 2 b) -5x ≥ -10 c) 10x ≤ 20 d) x-7 ≥ -11 Thank you for your help!

If a plane uses 20 gallons of gasoline to fly 260 miles, how many gallons will it ned to fly 400 miles? (round to the nearest tenth)

What is the area of a triangle whose vertices are P(−1, 4), Q(3, 2), and R(3, −4)?

Is it possible to plant peas that have already been in a recently bought can?

My teacher is born it 1889 how is she

What does br mean on the periodic table?

How did Mesopotamian irrigation systems allow civilizations to develop?

Why is it important to Grendel that his death be viewed as an accident?

Why did Jefferson and his Democratic Republican party oppose policies that favored manufacturing and trade? The Democratic Republicans felt they posed a threat

What does a cell use to eliminate a substance that is too large to leave by diffusion