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

what was the basic Sumerian building material?
Describe the differences between a prokaryotic and a eukaryotic cell, and identify their parts.
What is being personified in the following passage? Fear had settled over the city.
What is an analogy for democracy?
Which of the following differs when comparing the deep ocean to the intertidal zone? PLEASE HELP!!! •need for energy •salinity •the amount of sunlight •relianc
if 120 marks is 60% what is full marks
Mr Jones has 20,000 to invest. He invests part at 6% and part at 7%, if hr earns 1,280 in interest after 1 year, how much did he invest at each rate.
how many valenceelectrons does rare earth metals have
what are some physical changes that occur at school? at home ? in nature ?
Can someone help solve, 3y+6=30-7y