14x = -7y + 21 write in standard form.

14x + 7y = 21 is your answer.

Step-by-step explanation:

Standard form is Ax + By = C

Isolate the constant. Note the equal sign, what you do to one side, you do to the other. Add 7y to both sides.

14x = -7y + 21

14x (+7y) = -7y (+7y) + 21

14x + 7y = 21

14x + 7y = 21 is your answer.

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14x+7y =  21

Step-by-step explanation:

The standard form of a line is Ax+By =C

14x = -7y + 21

We need to add 7y to each side

14x+7y = -7y+7y + 21

14x+7y =  21

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.

answer: idk

step-by-step explanation: