Solve the system of equations. 5x + 2y = 12 5x – 2y = 28

Question

Solve the system of equations.

5x + 2y = 12
5x – 2y = 28

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Hải Đăng 5 years 2021-07-24T05:57:49+00:00 1 Answers 35 views 0

Answers ( )

  1. diemkieu
    0
    2021-07-24T05:59:35+00:00
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    Answer:

    x=4 y=-4

    Step-by-step explanation:

    Step: Solve5x+2y=12for x:

    5x+2y=12

    5x+2y+−2y=12+−2y(Add -2y to both sides)

    5x/5=−2y+12/5

    x= −2/5y+12/5

    −2/5y+12/5 for x in5x−2y=28

    5(−2/5y+12/5)−2y=28

    −4y+12=28(Simplify both sides of the equation)

    −4y+12+−12=28+−12(Add -12 to both sides)

    −4y=16

    −4y/−4=16/−4

    (Divide both sides by -4)

    y=−4

    Substitute −4 for y in x=−2/5y+12/5

    x= −2/5y+12/5

    x=−2/5(−4)+12/5

    x=4

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