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4x+2y=1 y=-2x+5 Solve by substitution x y ( ) I got x=1/2?

4 Answers

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  • ted s
    Lv 7
    4 years ago

    sorry , x = 1 / 2 ===> y = 4 but 4(1/2) + 2(4) ╪ 1....there is NO solution as these describe parallel lines

  • ?
    Lv 7
    4 years ago

    4x + 2y = 1

    y = -2x+5

    2x + y = 5

    4x + 2y = 10, which contradicts the first equation.

    No solution.

  • Colin
    Lv 7
    4 years ago

    The first equation can be rearranged to

    y = -2*x + (1/2)

    That's inconsistent with the second equation; there are no solutions.

  • alex
    Lv 7
    4 years ago

    4x+2(-2x+5)=1 --->no solution

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