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6x + 2x - 18 = 3x + 17 * 6
8x - 18 = 3x + 102
8x - 3x = 102 + 18
5x = 120
x = 120/5
x = 24
Solución :
x = 24
acomodamos terminos semejantes:
6x+2x-3x=102+18
5x=120
despejamos x
x=120/5
x=24
Por lo tanto "x" vale 24
Saludos cordiales, me alegra haberte ayudado!