noellequanstrum
noellequanstrum noellequanstrum
  • 18-05-2017
  • Mathematics
contestada

how do you do #1-

3x + y = 17
4x + y = 18

find for x and y

Respuesta :

Аноним Аноним
  • 18-05-2017
1st multiply the top equation by -1 to get -3x - y = -17 then add the 2 equations together to get:

4x + y - 3x - y = 18 - 17
x = 1 (simplified down)

Now plug the 1 into either equation
4(1) + y = 18
4 + y = 18
y = 18 - 4 = 14

Your point is (1, 14)
Answer Link

Otras preguntas

Answer the following questions show working.
Write an argumentative essay for grade7
How does this timeline BEST represent the period after World War II until the collapse of the Soviet Union?
Based on the graph you drew, Neha would likely have a systolic blood pressure of millimeters of mercury.
A plant population has the following distribution of alleles for flower color. Allele P Phenotype Purple Number of 150 alleles in the population O A. 0.10 OB. 0
what is the colow a w w w w w w wr of the sun
To whom does the phrase “We the People” in the Preamble of the Constitution refer? (L) A. all ordinary citizens, who are the source of all government power in a
9(8/20×-5)<89÷2+1.......................................
Which best describes Paine’s purpose in writing Common Sense? to persuade readers to fight for independence from Britain to persuade readers to seek a peaceful
Which of the following is a solution for k/-3+6 ≤ 5? Select all that apply. 5 -5 -3 3