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]

Answer Link

Otras preguntas

The number, 6.022 x 1023 is known as a ___.

Enter the value of p so the expression 5/6 - 1/3n is equivalent to p(5-2n).

Point R has coordinates (1, 0). Point S is symmetric to point R with respect to the line y = –2. What are the coordinates of point S? (Points : 10) (1, –4) (1,

what does suffrage mean?

what force helps a ship float?

Scientists have designed solar cells to trap solar energy and convert it to _____ energy. a hydrelectric b wind

Phong is rolling a number cube and flipping a coin .what is the probability that the cube will land on 4 and the coin will land heads up.

The shape and elevation of land in a region is called what ?

A soup recipe calls for two and three fourths quarts of vegetable broth. An open can of broth contains one half quarts of broth. how much more broth do you need

How do you pronounce Gjallarhorn