SavannahGrace06
SavannahGrace06 SavannahGrace06
  • 03-01-2022
  • Mathematics
contestada

Solve system by using the substitution method.

y=2x+9
8x-3=y


( ? , )

Respuesta :

itsandypandy
itsandypandy itsandypandy
  • 03-01-2022

Answer:

[tex]x = 2; y = 13[/tex]

Step-by-step explanation:

⇒ [tex]4y = 8x + 36[/tex]   [Multiply equation 1 by 4]

⇒ [tex]3y = 39[/tex]   [Subtract equation 2 from eq 1]

*Here I do 4y - y = 3y; 8x - 8x = 0; 36 - -3 = 39.

⇒ [tex]y = 13[/tex]   [Divide both sides by 3]

⇒ [tex]13 = 2x + 9[/tex]   [Sub in y]

⇒ [tex]2x = 4[/tex]   [Subtract 9 from both sides]

⇒ [tex]x = 2[/tex]   [Divide both sides by 2]

Hope this helps! :D

Answer Link

Otras preguntas

Identify the domain of the equation y = x2 − 6x + 1. x ≤ 3 x ≥ −8 x ≥ −2 All real numbers
The Sepoy Rebellion was caused by
Identify the correct sentence. a. ​rob's father said rob and the football coach are working on some new drills. b. ​rob's father said rob and the football coa
2/3m + a = a +r solve for m
How does a lithium cation compare to a lithium atom? A. The cation is larger. B. The cation has the same radius. C. The cation is smaller. D. The cation has the
wat is gcf of 18a and 20ab
On a math test it took Kiera 30 minutes to do 6 problems. Heath finish 18 problems in 40 minutes. Did the students work at the same rate? Explain your reasoning
WILL UPVOTE! solve and show all steps please (√25+√9)^2
round 23 miles per hour to the nearest ten miles per hour
how can i indentified by the atomic number?