3 years ago

Solve by substitution x-y=12 x+y=18

1 answer:

3 0

X = y + 12. You then substitute or plug in that from the first equation into the second equation. You get (y+12)+y=18, then you simplify to get your y value. In this case y = 3. The you can plug your y value into either equation. (x+3=18) or (x-3=12) or (x=3+12) either way you get x=15 and y=3.

You might be interested in

How do you find the difference between median and mean

Flura [38]

Median is the middle number. Ex:
1,3,5,7,10,13,14

The middle number is 7 because there is three numbers on either side of 7. The median would be 7.

The mean is when you add up all of the numbers and divide by the number of numbers. For example, 1,3,5,7,10,13,14
You add all of them. 1+3+5+7+10+13+14 equals 53. Then divide 53 by 7 because there are seven digits.

Median equals 7.57142857

5 0

3 years ago

Me ajudem nessa equação :<br> 10x - 12 + 10= +18 - 20

nirvana33 [79]

10x - 12 + 10 = 18 - 20
10x - 2 = -2
10x = 0
x = 0

6 0

3 years ago

A television is regularly priced at $900. This week, it goes on sale for 15% off. What's the new sale price? Step 1: set-up and

Solnce55 [7]

Answer: A

Step-by-step explanation:

3 0

2 years ago

Tony collected data on years of employment and the annual salaries of the sales people at Company Z. He made a scatter plot and

devlian [24]

Can you send a picture?

7 0

3 years ago

What's the answer for<br> −4y−4+(−3)

galben [10]

Answer:

4y--7 i think

Step-by-step explanation:

8 0

2 years ago