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ALGEBRA
- solved problems |
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Linear
equations
in one variable
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Solving linear equations |
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122. |
Solve given linear equations in one variable.
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Solutions:
a)
-1
-
(2
-
x)
= 2
-
(3x
+
1) |
-1
-
2
+
x
= 2
-
3x
-
1 |
x
+
3x
= 2 +
2 |
4x
= 4
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¸
4 |
x
= 1 |
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123. |
Solve linear equations.
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Solutions:
a) 23 - [9x
- (17 + 5x)
- 6]
= 10x - [11
- (2x
- 7)
+ 21x] + 9 |
23 -
[9x -
17 - 5x -
6] = 10x -
[11 -
2x + 7 + 21x]
+ 9 |
23 -
4x + 23
= 10x - 19x
- 18 + 9
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5x = -
55 | ¸5 |
x = -
11 |
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b) 3(x
- 1)
· (x
+ 5)
+ x · (x
- 4)
= 4x(3
+ x)
+ 5 |
3(x2
+ 4x -
5) + x2
- 4x
= 12x + 4x2 + 5 |
3x2 + 12x
- 15
+ x2 - 4x
= 12x + 4x2 + 5 |
- 4x
= 20 | ¸(-
4) |
x = -
5 |
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124. |
Solve given linear equations.
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125. |
Solve given linear equations in one variable.
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126. |
Solve given linear equations in one variable.
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Equations
with rational expressions
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127. |
Solve the following
rational equations.
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Solved
problems contents |
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