Answer:
METHOD 1:
5x+7(x+1)=5x-21
5x+7x+7=5x-21
12x+7=5x-21
12x-5x=-21-7
7x=-28
x=28/7
x=4
METHOD 2:
5x+7(x+1)=5x-21
5x+7(x+1)=5x-21-5x
7(x+1)=-21
7x+7=-21
7x=-28
x=4
Step-by-step explanation:
METHOD 1:
5x+7(x+1)=5x-21
5x+7x+7=5x-21
12x+7=5x-21
12x-5x=-21-7
7x=-28
x=28/7
x=4
METHOD 2:
5x+7(x+1)=5x-21
5x+7(x+1)=5x-21-5x
7(x+1)=-21
7x+7=-21
7x=-28
x=4
Answer:
paralelogram.
Step-by-step explanation:
Make a graph, plot the points and draw lines connecting them. Make your own conclusion because I cant write this for you. :)
I would use length for this
She had 98 to begin with, you would add the amount she sold with the amount she had left to get your answer.
it was 1/2 full add 7 gallons it is 3/4 full
so 7 gallons = 1/4 of the container ( 3/4-1/2 = 1/4)
so 7 x 4 = 28
container can hold 28 gallons.
The unknown number ( that is usually replaced by a variable, which is a letter) is found several ways depending on the art of the problem you are solving. You can use the method of substitution ( substituting random numbers into the problem) or you can set the problem up by subtracting or adding on both sides.