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Tomtit [17]
3 years ago
13

Substitution y=× +5 2x-y=-2

Mathematics
2 answers:
Alex73 [517]3 years ago
3 0
We know what y equals already. 

y = x + 5

2x - x + 5 = -2
x + 5 = -2
    -5      -5

x = -7

y = -7 + 5
y = -2

Now we have our values

Answer: (-7,-2) 
or
x = -7
y = -2
zubka84 [21]3 years ago
3 0
So, we substitute the y in the second equation to solve for x-value.

2x-(x+5) = -2
2x-x-5 = -2
x-5 = -2
  +5   +5
x = 3

As we got the x-value, we now have to find the value of y.

y = x+5
y = 3+5
y = 8

So, the answer is (3,8)

HOPE THIS HELPS!!!!!
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4 0
3 years ago
What THREE integers have a sum of 300?
quester [9]

Answer:

Here we will use algebra to find three consecutive integers whose sum is 300. We start by assigning X to the first integer. Since they are consecutive, it means that the 2nd number will be X + 1 and the 3rd number will be X + 2 and they should all add up to 300. Therefore, you can write the equation as follows:

(X) + (X + 1) + (X + 2) = 300

To solve for X, you first add the integers together and the X variables together. Then you subtract three from each side, followed by dividing by 3 on each side. Here is the work to show our math:

X + X + 1 + X + 2 = 300

3X + 3 = 300

3X + 3 - 3 = 300 - 3

3X = 297

3X/3 = 297/3

X = 99

Which means that the first number is 99, the second number is 99 + 1 and the third number is 99 + 2. Therefore, three consecutive integers that add up to 300 are 99, 100, and 101.

99 + 100 + 101 = 300

We know our answer is correct because 99 + 100 + 101 equals 300 as displayed above.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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