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Question 829678: barrys mountain bike weighs 6 pounds more than andys. If their bikes weigh 42 pounds altogether, how much does barrys bike weigh
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! ---
y = x + 6
x + y = 42
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put the system of linear equations into standard form:
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x - y = -6
x + y = 42
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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
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solution:
x = Andy's bike weighs 18 lbs
y = Barry's bike weighs 24 lbs
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system matrix
1 -1
1 1
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inverse of system matrix
0.5 0.5
-0.5 0.5
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determinant of system matrix = 2
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Solve and graph linear equations:
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Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
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Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php
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