r7jvngmxyn r7jvngmxyn
  • 26-01-2022
  • Mathematics
contestada

11x-y=21
9x+2y=-11

solving by subtitution plss help

Respuesta :

harpsickle213
harpsickle213 harpsickle213
  • 26-01-2022
you want to take away the y’s in each equation so you are left with the x’s for now

2(11x - y = 21) = 22x - 2y = 42

you are going add both equations to get:

31x = 31
x = 1

now substitute 1 into one equation

(9*1) + 2y = -11
9 + 2y = -11
2y = -20
y = -10

x = 1
y = -10
Answer Link

Otras preguntas

Describe what a person in the passenger seat will feel as the car reaches point A.
Gerundio del verbo comer más la partícula -sé al final
Which statement about the extremes of poverty wealth and opportunity during the late 1800s are true? Choose all answers that are correct A unions made sure that
how did people travel the Nile river? what and with who did they make trades with?
what is another term for air movement caused by differences in air pressure
The philosopher who introduced questions and argument to Grecian education was
Earth’s systems interact through _______. a. humans b. glacial episodes c. feedback mechanisms d. none of the above
Where does diffusion take place in the body?
What do you think the climate would be like if you lived at the base of a mountain near the ocean
Make r the subject of the formula. V=pier^2h