SOLUTION: Cameron has 11 adult fantail goldfish. This is 7 fewer fantail goldfish than twice his friend Julia has. Write and solve an equation to determine the number of fantail goldfish t

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Cameron has 11 adult fantail goldfish. This is 7 fewer fantail goldfish than twice his friend Julia has. Write and solve an equation to determine the number of fantail goldfish t      Log On


   

Question 937037: Cameron has 11 adult fantail goldfish. This is 7 fewer fantail goldfish than twice his friend Julia has. Write and solve an equation to determine the number of fantail goldfish that Julia has.
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
x = number of fish cameron
y = number of fish julia
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x = 11
x = 2y - 7
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put the system of linear equations into standard form
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x = 11
x - 2y = -7
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copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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answer:
x = number of fish cameron = 11
y = number of fish julia = 9
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now by substitution:
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x = 11
x = 2y - 7
11 = 2y - 7
2y = 11 + 7
2y = 18
y = 18/2
y = 9
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answer by substitution:
x = number of fish cameron = 11
y = number of fish julia = 9
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