lukerothbacher lukerothbacher
  • 02-02-2019
  • Mathematics
contestada

3x + 4y = 5
X- 3y = -7


Solve by substitution

Respuesta :

meredith48034
meredith48034 meredith48034
  • 02-02-2019
x = 3y - 7
3x + 4y = 5

3(3y - 7) + 4y = 5
9y - 21 + 4y = 5

13y - 21 = 5

13y = 26

y = 2

x - 3(2)= -7

x - 6 = -7

x = -1

(-1, 2)
Answer Link

Otras preguntas

Help please in math.
Why is matter important to cycles of nature?
Fish and chips is which country's national dish 1 australia,2 england,3 cuba
Please help me with all problems,, due tommorow :(
How did the Ottoman capture of Constantinople motive the Age of Exploration?
can someone answer these questions please I've been out for a while and I have no idea what its talking about?
If the forces that act on a cannonball and the recoiling cannon from which it is fired are equal in magnitude, why do the cannonball and cannon have very differ
what parts of an atom can change during a nuclear reaction that cannot change during a chemical reaction? A. number of protons and electronsB. the number of pr
can someone help me with my quiz. What number should be added to the expression x2+2x to change it into a perfect square trinomial? 1 2 4 9
Why is the pea wrinkled-seed allele a recessive allele?