-7x+12-2x=23+13x simplify by combining like terms that are on the same side of the equation

1 answer:

6 0

-7x+12-2x=23+13x

First take away 13x from the right side and put it on the left side adding taking it away from -7x

-7x(-13x)=-20x
-20x+12-2x=23

then add 2x to -20x
and move 12 to the other side, minus it off of 23

-18x=11

then divide -18x on both sides

then x=-11/18

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Step2247 [10]

To solve this problem you must apply the proccedure below:

1. Let's call:

x: hot dogs.
y: hamburguers.

2. Then, you must make a system of equations, as below:

5x+4y=12.25 (i)
4x+5y=12.50 (ii)

3. Now, you can solve the system of equation as below:

5x+4y=12.25
x=(12.25-4y)/5

4x+5y=12.50
4((12.25-4y)/5)+5y=12.50
y=1.5

4x+5y=12.50
4x+5(1.5)=12.50
x=1.25

4. Therefore, the answer is:

The cost of one hot dog is $1.25 and the cost of one hamburguer is $1.50

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