Hi there!
So, our two equations are:
2x + 3y = 20 and
-2x + y = 4
We can see that the x's will cancel out because they're the same number, opposite signs. Then we're left with 4y = 24.
Divide 24 by 4, which is 6.
y = 6, then we plug that in to the first equation for y:
2x + 3(6) = 20
2x + 18 = 20
2x = 2
x = 1
So, she made her first mistake when adding the equations, adding 20 and 4, she somehow got 16.
The solution to the system is (1,6).
I hope I helped!
Answer:
3 and 23
__
52
Step-by-step explanation:
Answer:
(2,22)
Step by step explanation:
(x,22) is the solution of the equation y=9x+4
9x+4= 22
=>9x= 22-4
=>9x=18
=>x= 2
Answer:
Answer down below!
Step-by-step explanation:
The simple way to do this is shown below:
Since two tires cost $74, you know that if you multiply that by two, you'll get your four.
74 x 2 = 148
<em>Four tires will cost you $148</em>
Answer:
It is multiplied by a factor of 8
Step-by-step explanation:
