9. Решите уравнения:
1) 3х - 15 = х + 3;
2) 7 - 3x = x + 11;
3) 2(x + 3) = x + 13;
4) 4(5 - x) = 3x - 1; 5)3(х-2)=х+4 6)5(х-1)=4х+3
1) 3х - 15 = х + 3;
2) 7 - 3x = x + 11;
3) 2(x + 3) = x + 13;
4) 4(5 - x) = 3x - 1; 5)3(х-2)=х+4 6)5(х-1)=4х+3
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Ответ:
Пошаговое объяснение:
1)9.
2) -1.
3) 7.
4) 3.
1) 2x = 18
x = 9
2) -4x = 4
x = -1
3) 2x + 6 = x + 13
x = 7
4) 20 - 4x = 3x - 1
21 = 7x
x = 3
5) 3x - 6 = x + 4
2x = 10
x = 5
6) 5x -5 = 4x + 3
x =8