Explore BrainMass

Explore BrainMass

    Working with the method of substitution

    Not what you're looking for? Search our solutions OR ask your own Custom question.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    Please help me with #4, #10, and #16. I am having trouble woth these. Please show your work so that I may better understand the process.

    © BrainMass Inc. brainmass.com March 4, 2021, 5:51 pm ad1c9bdddf
    https://brainmass.com/math/basic-algebra/working-method-substitution-14241

    Attachments

    Solution Preview

    So let us see how to solve equations by the method of substitution.

    The substitution method is used to eliminate one of the variables by replacement when solving a system of equations.

    Think of it as "grabbing" what one variable equals from one equation and "plugging" it into the other equation.

    4)
    2x + 7y = 4 ...(1)
    x + 3y = 1.....(2)
    we can write 2 as, x = 1 - 3y ...

    Solution Summary

    Clear explanations and all mathematical steps are provided. The methods of substitutions are given.

    $2.49

    ADVERTISEMENT