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math help please????
9: |x| = -87
{x| 87}
{x| -87}
{x| 8 - 7}
{x| no solution}
7: |x + 11 - 9| - 3 = 23
{x| -8, 4}
{x| -28, 24} is it this one?
{x| -8, 24}
{x| no solution}
0: |5 + x| + 5 = 25
{x| -20, 15}
{x| -25, 10}
{x| -5, 15}
{x| -25, 15}
11: 3|x - 2| = 9
{x| -2, 5}
{x| -1, 3}
{x| -1, 5}
{x| 1, 5}
5 Answers
- MathematicaLv 71 decade agoFavorite Answer
9: |x| = -87
no solution. Absolute value can't equal a negative number.
7: |x + 11 - 9| - 3 = 23
|x + 11 - 9| = 26
|x + 2| = 26
x + 2 = 26 AND x + 2 = -26
x = 24 AND x = -28
10: |5 + x| + 5 = 25
|5 + x| = 20
5 + x = 20 AND 5 + x = -20
x = 15 AND x = -25
11: 3|x - 2| = 9
|x - 2| = 3
x - 2 = 3 AND x - 2 = -3
x = 5 AND x = -1
- harry mLv 61 decade ago
9: |x| = -87
{x| no solution}
7: |x + 11 - 9| - 3 = 23
{x| -28, 24} is it this one?
0: |5 + x| + 5 = 25
{x| -25, 15}
11: 3|x - 2| = 9
{x| -1, 5}
- 1 decade ago
9. {x| no solution} because the result of taking an absolute value is always non-negative
7. |x + 11 - 9| - 3 = 23
|x + 2| - 3 = 23
|x + 2| = 26
x+2=26 or x+2=-26
x=24 or x=-28
so, {x| -28, 24}
0. |5 + x| + 5 = 25
|5 + x| = 20
5+x=20 or 5+x=-20
x=15 or x=-25
So, {x| -25, 15}
11. 3|x - 2| = 9
|x - 2| = 3
x-2=3 or x-2=-3
x=5 or x=-1
So, {x| -1, 5}
- Anonymous1 decade ago
No solution
Soution for 7:
{x/ -28, 24}
Solution for 0:
{x/ -25,15}
Solution for 11:
{x/ -1,5}
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