Alguem me ajudaaaaa é para hj
Soluções para a tarefa
Resposta:
A) 2x - 20 = 100
2x = 100 - 20
2x = 80
x = 80/2
x = 40
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B) 3x + 2x = 600
5x = 600
x = 600/5
x = 120
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C) 1000 - x = x + 450
-x - x = 450 - 1000
-2x = -550 . (-1)
2x = 550
x = 550/2
x = 275
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D) 4x + 58 = 3x - 12
4x - 3x = -12 - 58
x = -70
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E) x + 5x = x - 210
x + 5x - x = -210
6x - x = -210
5x = - 210
x = - 210/5
x = -42
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F) 500 - x = x + 120
- x - x = 120 - 500
-2x = -380 . (-1)
2x = 380
x = 380/2
x = 190