Intermediate Algebra

Determine whether the point (1, 8) is a solution of the system
2x + 6y = 50
10x + 0y = 10
by substituting the point into each equation.

So far I have:
2x=6y=50
y=50-2x

10x+10y=10
10x+0(50-2x)=10
10x+0=10
x=10

y=50-2x
y=50-2(1)
y=50-2
y=48

PLEASE HELP! I'm lost. I've had tutoring and still do not understand fully.

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asked by Jordan
  1. Plug x=1 and y=8 into the two equations simultaneously and see if both are satisfied.

    They both are.
    2 + 48 = 50
    10 = 10

    Therefore (1,8) is the solution.

    Your equation y=50-2x
    is wrong.

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    posted by drwls
  2. You are confusing SOLVING the two equations (which is possible by various means) with TRYING OUT a sample solution you have been given, to see if it works.

    You have made the problem harder than it really is, and made mistakes in the process.

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    posted by drwls

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