bettina20001 bettina20001

06-06-2017
Mathematics

contestada

18x-16y=-312 78x-16y=408

Respuesta :

apologiabiology apologiabiology

08-06-2017

elimination
multiply first equation by -1 and add to 2nd

-18x+16y=312
78x-16y=408 +
60x+0y=720

60x=720
divide both sides by 60
x=12

sub back

18x-16y=-312
18(12)-16y=-312
216-16y=-312
-16y=-528
divide both sides by -16
y=33

x=12
y=33
(x,y)
(12,33)

Answer Link

Otras preguntas

What is the square root of 150 simplified?

is genetic material found in plant cells, animal cells, or prokaryotic cells?

Factor out the coefficient of the variable 2/3 j - 2/9

a biotic or an abiotic resource in the environment that causes population size decrease is

What is the answer to the fraction 6 5/8-4 2/9

A thermometer reading 5 degrees celsius is brought into a room with a constant temperature of 35 degrees celsius. a.) If the thermometer reads 15 degrees celsiu

What´s 200 divided by 30 ???

12 less than one-eleventh of some number, w"

Roger built a model car of a station wagon he actually owns. Based on the ratio on the box, he knows that every inch in the length of his model car represents 2

What type of organism is a one-celled organism that functions as a single unit? multicellular precellular unicellular bicellular