Answer:
Uhhhh si he counted 40 cars so just do 40 times 9 which is 360
Answer:
Elimination method
Step-by-step explanation:
We have a choice to eliminate the y or x:
I chose x
So now we double the second equation to make the co efficient of x the same:
6x-5y = -3
6x+4y = 24
Now we subtract both equations to eliminate the x's:
6x-5y = -3
- - -
6x+4y = 24
-9y = -27
y = 3
Now we substitute this value into either equation 1 or 2:
I chose 2
3x + 2(3) =12
Simplify:
3x + 6 =12
Subtract 6 from both sides:
3x + 6 -6 = 12 -6
Simplify:
3x = 6
Divide both sides by 3:
3x÷3 = 6÷3
Simplify:
x = 2
Let <em>x</em> and <em>y</em> be the two numbers.
Their sum is 140, so
<em>x</em> + <em>y</em> = 140
Twice the first number <em>x</em> is 2<em>x</em>. 5 more than this is 2<em>x</em> + 5. This is the value of the second number, so
<em>y</em> = 2<em>x</em> + 5
Substitute this into the first equation and solve for <em>x</em> :
<em>x</em> + (2<em>x</em> + 5) = 140
3<em>x</em> + 5 = 140
3<em>x</em> = 135
<em>x</em> = 135/3 = 45
Then
<em>y</em> = 2*45 + 5 = 95
It depends on what the degrees is of them bith
