benchang531
30.06.2019 •
Mathematics
What is the solution of this linear system ? 3x + y = -2 y = -x +4
Solved
Show answers
More tips
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- S Style and Beauty How to Get Rid of Peeling Nails: Natural Remedies...
- S Science and Technology Understanding Magnetic Storms: A Guide to This Natural Phenomenon...
- F Family and Home What is Most Important in Men s Lives?...
- G Goods and services Which TV is better - LCD or Plasma?...
- C Computers and Internet Are there special gaming mice?...
- G Goods and services LED-подсветка в LCD-телевизорах: 5 причин, почему она лучше других технологий...
- C Computers and Internet Keep Your Mouse Pad Clean: The Right Way to Clean It?...
Answers on questions: Mathematics
- M Mathematics wanda dougherty earned a weekly salary of $509 for the first 26 weeks of the year. she changed jobs and was paid a weekly salary of $576 for the last 26 weeks of the year. what...
- M Mathematics Question 3 (5 points) In the figure below, JL and MK are segment bisectors of each other, m4JPK = 130° (the measure of angle JPK=130°), JP = 5x – 4, PL = 3x + 2, MK = 8y - 10, and...
- M Mathematics -1/4 divided by 7/4 and show the work!...
- M Mathematics If 2x = 12, find the value of 4 - 5x? Please answer this question ASAP...
- M Mathematics Taxi A charges $8 to get in the cab and $0.75 per mile. Taxi B charges $3 to get in the cab and $1.25 per mile. For how many miles must you go for the taxis to cost the same? Be...
- M Mathematics Please help! Write your answer as a decimal to the equation that is modeled below....
- M Mathematics a space dome theatre is composed of a cylindrical base and a hemispherical roof. sketch the space dome theatre with a base radius of 40m and a cylindrical height of 20m...
- M Mathematics Whats the diameter of the circle? and how do you get the diameter?...
- M Mathematics Fill in the blank for the following two-column proof. [SEE ATTACHMENT]...
- M Mathematics Gaylas mom bought 9.5 gallons of gas for 21.85. What is the cost of a gallon of gas? please answer quick...
Ответ:
x = -3
y = 7
There are a few ways to do this but lets do it the following way.
3x + y = -2
y = -x +4 <--- turn this to standard form
y = -x + 4
x + y = 4
3x + y = -2
x + y = 4 < Times this by -3 to cancel out
3x + y = -2
-3(x + y) = 4 * -3
3x + y = -2
-3x -3y = -12
+ y = -2
-3y = -12
-2y = - 14
-2y / -2 = - 14 / -2
y = 7
Now that we found y we can insert 7 into the y position in one of the equation. For instance
y = -x +4
7 = -x + 4
7 = -x + 4
-4 + 7 = -x
3 = -x
x = -3
Ответ: