SOLUTION: the sum of two numbers is -15. one number is 3 less than the other find a larger number

Question 828415: the sum of two numbers is -15. one number is 3 less than the other find a larger number
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
---
x + y = -15
x = y - 3
---
put the system of linear equations into standard form:
---
x + y = -15
x - y = -3
---
copy and paste the above linear system in standard form into this matrix-method solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
---
solution:
x = -9
y = -6
---
system matrix
1 1
1 -1
---
inverse of system matrix
0.5 0.5
0.5 -0.5
---
determinant of system matrix = -2
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php

RELATED QUESTIONS
The sum of 2 numbers is 64. One number is 5 less than twice the other. Find the larger... (answered by DrBeeee)

The sum of two numbers is 9. One number is 3 less than twice the other. Find the two... (answered by josmiceli)

The sum of two numbers is 180. One number is 20 larger than the other. Find the two... (answered by Alan3354)

the sum of two numbers is 16. one number is 4 less than 3 times the other. find the... (answered by harpazo)

The sum of two numbers is 58. One number is 17 more than the other. Find the larger... (answered by Fombitz,london maths tutor,solver91311)

The sum of two consecutive number is 4 less than the larger number. Find the numbers (answered by DrBeeee,ReadingBoosters)

The sum of two numbers is twenty- one. Three times the smaller number is two less than... (answered by checkley77)

Two numbers have a sum of 106. One number is 10 less than the other. Find the... (answered by josgarithmetic)

The sum of two numbers is 44. One number is 8 less than the other number. Find the... (answered by pakhi)