janyiabrown149 janyiabrown149

29-01-2021
Mathematics

contestada

Is (1, 1) a solution to this system of equations?
8x + 2y = 10
X + 9y = 10

Respuesta :

asmaNasr asmaNasr

29-01-2021

Answer:

Yes.

Step-by-step explanation:

[tex]8x + 2y = 10 \\ x + 9y =10 \\ x = 10 - 9y \\ 8(10 - 9y) + 2y = 10 \\ 80 - 72y + 2y = 10 \\ - 70 y = - 70 \\ y = 1 \\ x = 10 - 9y[/tex]

[tex]x = 10 - 9 \times 1 \\ x = 1[/tex]

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