yashvinappadoo
yashvinappadoo yashvinappadoo
  • 02-01-2016
  • Mathematics
contestada

solve the simultaneous equations
3x-y=18
2x+y=7
answer x=
y=

Respuesta :

Billymkhoi
Billymkhoi Billymkhoi
  • 02-01-2016
3x -y= 18 (1)
2x +y = 7 (2)

Take (1)+ (2):
(3x+2x)+ (-y+y)= 18+7
⇒ 5x = 25
⇒ x= 25/5
⇒ x=5

Use (2) to find y:
2*5+y= 7
⇒ 10+y=7
⇒ (10-10)+y= 7-10
⇒ y = -3

Final answer:
x=5, y=-3.

Hope this helps~

Answer Link

Otras preguntas

graph the linear equation find three points that solve the equation then plot on the graph -3y=-x-7
Of the events listed here which comes the latest in ciliate reproduction? note: not all events in the reproduction are listed.
Tchaikovsky's Romeo and Juliet contains several themes, including a flowing, gentle theme meant to represent   A. the breeze.   B. a river.   C. love.   D. chil
44.69 rounded to the nearest tenth
Which pathway would be used during a one minute, steep climb?
Which of the following statements cannot be tested by science?
The romantic era saw a revival of J.S. Bach's baroque compositions, thanks to A. C.P.E. Bach. B. Felix Mendelssohn. C. Richard Wagner. D. Giuseppe Ver
You apply a potential difference of 5.70 v between the ends of a wire that is 2.90 m in length and 0.654 mm in radius. the resulting current through the wire is
What are Spanish opinions
which of these is the scientific name for the organism? a( mountain lion b( puma c(panther d(puma concolor