ryleeward860 ryleeward860

22-03-2022
Mathematics

contestada

x + 3y=9
x + y = 21
Solve it algebraically

Respuesta :

WiseKun WiseKun

22-03-2022

Answer:

[tex]x=27[/tex]

[tex]y=-6[/tex]

Step-by-step explanation:

substitute in values

[tex]x=21-y[/tex]

[tex](21-y)+3y=9[/tex]

[tex]21+2y=9[/tex]

[tex]2y=-12[/tex]

[tex]y=-6[/tex]

[tex]x+(-6)=21[/tex]

[tex]x=27[/tex]

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