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2x = 19 -5
2x = 14
x = 14/2
x = 7
Verificacion.
2*7 +5 = 19
14 +5 = 19
19 = 19
3x - 4 = 20
3x = 20 +4
x = 24/3
x = 8
Verificacion
3*8 - 4 = 20
24 - 4 = 20
20 = 20
5x - 3 = 3x +7
5x - 3x = 7 +3
2x = 10
x = 10/2
x = 5
Verificacion
5*5 -3 = 3*5 +7
25 -3 = 15+7
22 = 22
4x +9 +x = 24
5x = 24 -9
5x = 15
x = 15/5
x = 3
Verificacion.
4*3 + 9 +3 = 24
12 +9 + 3 = 24
24 = 24
5x +10 = 7x -4
10 +4 = 7x - 5x
14 = 2x
14/2 = x
7 = x
x= 7
Verificacion.
5*7 + 10 = 7*7 - 4
35 +10 = 49 -4
45 = 45