9. Resuelve las siguientes ecuaciones. Luego comprueba los resultados.
a) 3x – 4 = 16
b) 4x + 5 + x = 3 + 2x + 4
c) 10x – 3x + 5 = 18 – x + 3
Respuestas
Respuesta:
a) 3x - 4 = 16
x = 16 + 4/3
x = 20/3
COMPRUEBO:
3(20/3) - 4 = 16
20 - 4 = 16
16 = 16
b) 4x + 5 + x = 3 + 2x + 4
5x - 2x = 7 - 5
3x = 2
x = 2/3
COMPRUEBO:
4 (2/3) + 5 + 2/3 = 3 + 2(2/3) + 4
8/3 + 17/3 = 3 + 4/3 + 4
25/3 = 25/3
c) 10x - 3x + 5 = 18 - x + 3
7x + x = 21 - 5
8x = 16
x = 16/8
x = 2
COMPRUEBO:
10(2) - 3(2) + 5 = 18 - 2 + 3
20 - 6 + 5 = 19
19 = 19
Espero que te sirva :)
a) 3x - 4 = 16
x = 16 + 4/3
x = 20/3
COMPROBACION:
3(20/3) - 4 = 16
20 - 4 = 16
16 = 16
b) 4x + 5 + x = 3 + 2x + 4
5x - 2x = 7 - 5
3x = 2
x = 2/3
COMPROBACION:
4 (2/3) + 5 + 2/3 = 3 + 2(2/3) + 4
8/3 + 17/3 = 3 + 4/3 + 4
25/3 = 25/3
c) 10x - 3x + 5 = 18 - x + 3
7x + x = 21 - 5
8x = 16
x = 16/8
x = 2
COMPROBACION:
10(2) - 3(2) + 5 = 18 - 2 + 3
20 - 6 + 5 = 19
19 = 19