SOLUTION: Jenny has three more than twice the number of compact discs as Joshua. If Jenny has 27 compact discs, how many discs does Joshua own?

Question 826288: Jenny has three more than twice the number of compact discs as Joshua. If Jenny has 27 compact discs, how many discs does Joshua own?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
---
x = Jenny
y = Joshua
---
x = 2y + 3
x = 27
---
put the system of linear equations into standard form:
---
x - 2y = 3
x = 27
---
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 = Jenny = 27
y = Joshua = 12
---
system matrix
1 -2
1 0
---
inverse of system matrix
0 1
-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
Audiocasette tapes cost 4 dollars each and compact discs cost 12 dollars each. If the... (answered by checkley71)

The ratio of cassettes to compact discs was 10 to 3, and the number of cassettes was 10... (answered by ankor@dixie-net.com,ptaylor)

If 90% of James compact discs cost $15 each and if 10% if his compact discs cost 12$... (answered by JulietG)

A student can afford to spend up to $330. on a stereo and some compact discs. if the... (answered by rfer)

Tom has 6 blue discs and 12 red discs in his pocket. How many discs does he need to take... (answered by scott8148)

Compact discs cost $16.99 each and cassette tapes cost $8.99 each. If the total bill... (answered by checkley77)

Find the unit rate? $42 at 5 compact discs... (answered by edjones)

The cost to produce one compact disc is $1.25 plus a one-time fixed cost of $2500. The... (answered by nunezs1981)

The cost to produce one compact disc is $1.75 plus a one-time fixed cost of $2500. The... (answered by JulietG)