Respuesta:
• 2x = 4
x = 4/2
x = 2
• x + 7 = 3²
x + 7 = 9
x = 9 - 7
• 2 + x - 5 = 12 + 3
2 - 5 + x = 15
-3 + x = 15
x = 15 + 3
x = 18
• 8x = x + 2
8x - x = 2
7x = 2
x = 2/7
.......
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Respuesta:
• 2x = 4
x = 4/2
x = 2
• x + 7 = 3²
x + 7 = 9
x = 9 - 7
x = 2
• 2 + x - 5 = 12 + 3
2 - 5 + x = 15
-3 + x = 15
x = 15 + 3
x = 18
• 8x = x + 2
8x - x = 2
7x = 2
x = 2/7
.......