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20 August, 07:21

What is the solution of this system of equations? X+5y=10

3x+y=16

A) x=0

Y=2

B) x=5

Y=1

C) X=3

Y=7

D) x=-10

Y=4

+5
Answers (1)
  1. 20 August, 07:51
    0
    {x = 5, y = 1 thus the Answer is B

    Step-by-step explanation:

    Solve the following system:

    {x + 5 y = 10 | (equation 1)

    {3 x + y = 16 | (equation 2)

    Swap equation 1 with equation 2:

    {3 x + y = 16 | (equation 1)

    {x + 5 y = 10 | (equation 2)

    Subtract 1/3 * (equation 1) from equation 2:

    {3 x + y = 16 | (equation 1)

    {0 x + (14 y) / 3 = 14/3 | (equation 2)

    Multiply equation 2 by 3/14:

    {3 x + y = 16 | (equation 1)

    {0 x+y = 1 | (equation 2)

    Subtract equation 2 from equation 1:

    {3 x+0 y = 15 | (equation 1)

    {0 x+y = 1 | (equation 2)

    Divide equation 1 by 3:

    {x+0 y = 5 | (equation 1)

    {0 x+y = 1 | (equation 2)

    Collect results:

    Answer: {x = 5, y = 1
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