Respuesta:
a)6
b)2/3
c)6
d)1
e)6
f)1
Explicación paso a paso:
a) x + 7 = 13
x = 13 - 7
x = 6
b) 6x + 4 = 8
6x = 8 - 4
6x = 4
x = 4/6 = 2/3
c) x + 1 = 7
x = 7 - 1
d) 3 + x = 4
x = 4 - 3
x = 1
e) 5x - 10 = 20
5x = 20 + 10
5x = 30
f) 2x + 5 = 7
2x = 7 - 5
2x = 2
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Respuesta:
a)6
b)2/3
c)6
d)1
e)6
f)1
Explicación paso a paso:
a) x + 7 = 13
x = 13 - 7
x = 6
b) 6x + 4 = 8
6x = 8 - 4
6x = 4
x = 4/6 = 2/3
c) x + 1 = 7
x = 7 - 1
x = 6
d) 3 + x = 4
x = 4 - 3
x = 1
e) 5x - 10 = 20
5x = 20 + 10
5x = 30
x = 6
f) 2x + 5 = 7
2x = 7 - 5
2x = 2
x = 1