resolver las siguientes ecuaciones de primer grado con una incognita y arrastrar la respuesta correcta
Respuestas
Al resolver las ecuaciones de primer grados se obtiene:
1. x = 2
2. x = -2
3. x = 9
4. x = 4
5. x = 3
6. x = 3
7. x = 3
8. x = 15/11
9. x =-1/2
10. x = -1/3
Explicación paso a paso:
1. 2x - 7 = - 3
Despejar x;
2x = -3 + 7
x = 4/2
x = 2
2. 3x + 5 = -1
Despejar x;
3x = - 1 - 5
x = -6/3
x = -2
3. 2x - 8 = 10
Despajar x;
2x = 10 + 8
x = 18/2
x = 9
4. 5x - 7 + 2x = 4x + 5
Despejar x;
5x + 2x - 4x = 5 + 7
3x = 12
x = 12/3
x = 4
5. 5x - 2x -4 = x + 7 - 5
Despejar x;
5x - 2x - x = 7 - 5 + 4
2x = 6
x = 6/2
x = 3
6. x - (2x + 1) = 8 - (3x+ 3)
x - 2x - 1 = 8 -3x - 3
Despejar x;
x - 2x +3x = 8 - 3 + 1
2x = 6
x = 6/2
x = 3
7. 2(x - 1) - 5 = 14 - x
2x - 2 - 5 = 14 - x
Despejar x;
2x + x = 14 + 7
3x = 21
x = 21/7
x = 3
8. 15x - 10 = 6x - (x - 2) + (-x + 3)
15x - 10 = 6x - x + 2 - x + 3
Despejar x;
15x - 6x + 2x = 2 + 3 +10
11x = 15
x = 15/11
9. x - 3(x - 1) = 6 -4(2x + 3)
x - 3x - 3 = 6 - 8x - 12
Despejar x;
-2x + 8x = -6 + 3
6x = -3
x = -3/6
x =-1/2
10. 6 - 3(x-1)= -4x + 2(1-x)
6 - 3x - 3 = -4x + 2 - 2x
Despejar x;
-3x + 6x = 2 - 3
3x = -1
x = -1/3
Respuesta:
1: x=2
2: x=-2
3: x=9
4: x=4
5: x=3
6: X=3
7: x=7/3
8: x=1
9: x=-1/4
10: x=-1/3