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timama [110]
3 years ago
12

15=7-|2x| Solve for x in this absolute value equation.

Mathematics
2 answers:
DIA [1.3K]3 years ago
8 0
15=7-|2x|\\
-|2x|=8\\
|2x|=-8\\
x\in\emptyset
ivann1987 [24]3 years ago
6 0
7-|2x|=15\ \ \ \ |subtract\ 7\ from\ both\ sides\\\\-|2x|=8\\\\|2x|=-8-FALSE\\\\x\in\O\ because\ |a|\geq0\ for\ each\ a\in\mathbb{R}

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The sum of two numbers is 72 and their difference is 40. Using elimination method
d1i1m1o1n [39]

Answer:

here's what we know:

a + b = 72

a - b = 26

We can use the elimination method to solve this problem:

a + b = 72

a - b = 26

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2a = 98

Divide both sides by 2:

a = 49

So we now have:

49 + b = 72

and:

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Step-by-step explanation:

3 0
3 years ago
Solve the system by substitution <br><br> -x-y-z= -8<br><br> -4x+4y+5z= 7<br><br> 2x+2z= 4
Gennadij [26K]
- x - y - z = - 8 ------- (1)
- 4x + 4y + 5z = 7 -------- (2)
2x + 2z = 4 --------- (3)

From (3): x + z = 2
                      x = 2 - z --------- (4)

Substitute (4) into (1),
- x - y - z = - 8
- (2-z) - y - z = - 8
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Substitute y = 6 and (4) into (2),
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Therefore, z = - 9

Substitute z = - 9 into (4),
x = 2 - z
x = 2 - (-9)
x = 2 + 9
Therefore x = 11

Solution:
x = 11
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z = -9
4 0
3 years ago
Read 2 more answers
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Snowcat [4.5K]

Answer: A. 47.50

Step-by-step explanation: 5% or 0.05 X $950.

5% X $950 = $47.50

3 0
3 years ago
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