The answer is x = -2 and y = 2.
<u>Explanation</u>:
- The first equation can be written as x - y = -4
- The second equation can be written as 2x + y = -2
<u>step 1</u> :
Solving by elimination method to find the value of x and y,
x - y = -4
<u>2x + y = -2</u>
<u>3x = -6</u>
<u>step 2</u> :
x = -6/3 = -2
The value of x is x = -2
<u>step 3</u> :
Substitute x = -2 in any of the given equations.
⇒ y = x + 4
⇒ y = -2 + 4
⇒ y = 2
Nitrogen (N), nonmetallic element of Group 15 [Va] of the periodic table. It is a colourless, odourless, tasteless gas that is the most plentiful element in Earth's atmosphere and is a constituent of all living matter. Boiling point: −195.8 °C (−320.4 °F)
Atomic number: 7 has five electrons in its outer shell, so it is trivalent in most compounds. Nitrogen is important for plant growth and can be 'fixed' by lightning or added to soils in fertilisers. A colourless, odourless gas. Nitrogen is important to the chemical industry. It is used to make fertilisers, nitric acid, nylon, dyes and explosives.
If the equations have the same slope for example y=4x+2 AND y=4x+3 have the smae slope of 4/1, making them parallel but if the don't have the same slope for example y=2x+3 and y=4x+4 then they are not parallel
