Respuesta:
actividad 5:
a)- 4x + 21 = 121
4x = 121 -21
4x = 100
x= 100 : 4
x= 25
b)- 6x = 60
x = 60:6
x = 10
c)- 2x - 4 = 12
2x = 12 + 4
2x = 18
x = 18 : 2
x = 9
d)- 3x - 10 = 20
3x = 20 + 10
3x = 30
x = 30 : 3
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Respuesta:
actividad 5:
a)- 4x + 21 = 121
4x = 121 -21
4x = 100
x= 100 : 4
x= 25
b)- 6x = 60
x = 60:6
x = 10
c)- 2x - 4 = 12
2x = 12 + 4
2x = 18
x = 18 : 2
x = 9
d)- 3x - 10 = 20
3x = 20 + 10
3x = 30
x = 30 : 3
x = 10