laylalucia12 laylalucia12
  • 26-02-2021
  • Mathematics
contestada

Solve the simultaneous equations
4x + y = 20
x - y = 15

Respuesta :

NinjaNoir
NinjaNoir NinjaNoir
  • 26-02-2021

Answer:

X=7

y= -8

Step-by-step explanation:

4x+y+(x-y)=20+15

4x+y+x-y=35

plus y and minus y cancels out.

4x+X= 35

5x=35

X= 7

Substitute X=7 in any equation

x-y=15

7-y=15

y=-8

Answer Link

Otras preguntas

−7⋅30.25x=−10 Solve exponential equations using logarithms: base-2 and other bases
Which law does it violate if a restaurant describes frozen lobsters as fresh lobsters on its menu? A. Common Law B. Food, Drug, and Cosmetics Act C. Truth-in
What is the value of 7x^(2) + 2x whenx=3?
find the slope between the two points. (3,7) and (-4,2)?​
Which fossil fuel produces the most carbon dioxide?
Merchandise is ordered on november 10; the merchandise is shipped by the seller and the invoice is prepared, dated, and mailed by the seller on november 13; the
Write a 250-word essay explaining how the quotes you selected link all the themes of each of the stories. Use specificexamples that illustrate the tone, style,
How many juice glasses, each having a capacity of125 mL, could be filled from a pitcher containing2 L of juice?​
help with these please someone?
Where is the hole in the ozone located??? Please help me... I’m confused.