6. Решите уравнения.
а) (2x +1) + 3x = 11
б) (х – 5) - (2 - 2x) = 6
в) (4х – 1) - (3х + 1) = 2
г) -(3х + 5) + (4 – 7x) = 4
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Ответы на вопрос:
Пошаговое объяснение:
а) (2x +1) + 3x = 11
2x + 1 + 3x = 11
5x + 1 = 11
5x = 11 - 1
5x = 10
x = 10:5
x = 2
б) (х – 5) - (2 - 2x) = 6
x - 5 - 2 + 2x = 6
3x - 7 = 6
3x = 6+7
3x = 13
x = 13:3
x = 4 1/3
в) (4х – 1) - (3х + 1) = 2
4x - 1 - 3x - 1 = 2
x - 2 = 2
x = 2+2
x = 4
г) -(3х + 5) + (4 – 7x) = 4
-3x - 5 + 4 - 7x = 4
-10x - 1 = 4
-10x = 4+1
-10x = 5
x = -5:10
x = -0,5
ответ: а)2; б) 13/3; в) 4; г)-1/2
а) (2x +1) + 3x = 11
2x + 1 + 3x = 11
5x = 10
x = 2
б) (х – 5) - (2 - 2x) = 6
x - 5 - 2 + 2x = 6
3x = 13
x = 13/3
в) (4х – 1) - (3х + 1) = 2
4x - 1 - 3x - 1 = 2
x = 4
г) -(3х + 5) + (4 – 7x) = 4
-3x - 5 + 4 - 7x = 4
-10x = 5
x = -1/2
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