Mathematics

Question

Y=-3/2x+9 2x+2y=16 how to solve it by using substitution

2 Answer

  • y=-3/2x+9
    or
    y+3/2x=9, or 2y+3x=18
    2y+2x=16. -
    2y+2x=16

    x=2
    y=6. Hope it help!
  • Equation 1)  y = -3/2x + 9
    Equation 2)  2x + 2y = 16

    Add 3/2x to both sides of equation 1.

    1)  3/2x + y = 9

    Then, multiply all of equation one by 2.

    1)  2(3/2x + y = 9)

    1)  3x + 2y = 18
    2)  2x + 2y = 16

    Subtract.

    x = 2

    Plug in 2 for x in the first equation.

    y=-3/2x+9

    y = -3/2(2) + 9

    y = -3 + 9

    y = 6

    So, x=2 and y = 6

    ~Hope I helped!~
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