IHYSMILEY IHYSMILEY

22-06-2022
Mathematics

contestada

Find the value of x in 3x + 4y = 12 and 9x - 4y = 24.

Respuesta :

TalShmueli TalShmueli

22-06-2022

Answer:

x=3

Step-by-step explanation:

we first write both equations:

[tex]3x + 4y = 12 \\ 9x - 4y = 24[/tex]

then we add the Left hand sides from both, and compare to the Right hand sides from both:

[tex]3x + 4y + 9x - 4y = 12 + 24 \\ 3x + 9x = 36 \\ 12x = 36 \\ x = 3[/tex]

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