Answer:
Given:
x-y=-4
2x+y=4
Step-by-step explanation:
x-y=-4
2x+y=4
add both the equation, we get
⇒ x-y=-4
2x+y=4
⇒3x=-4+4
⇒3x=0
⇒x=0
∴ to find the value of y, put the value of x in any one equation
⇒x-y=-4
⇒0-y=-4
⇒-y=-4
⇒y=4
∴ x=0, y=4
< the bigger number is facing the back of the arrow it points to the smaller number Example: 1<2
20% of the regular price was off.
So 80% of the regular price stayed on.
$33.96 was that 80% of the regular price.
(0.8) · (regular price) = $33.96
Divide both sides by (0.8).
Regular price = ($33.96) / (0.8)
<em>Regular price = $42.45</em>
Answer:if y=0
Step-by-step explanation: view y as 0, so you have 2*0*(-8+0+7)=0
every number multiplied by 0 is 0 so 2*0 is 0 then in the brackets you will have -1. So the final line is 0*-1=0 like I said every number multiplied for 0 is 0 the equation is true for y=0
