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Resolva as equações:
a) 2x + 5 - 5x= -1
b) -3x + 10= 2x + 8 + 1
c) 7x - 4 - x= -2x + 8 - 3x
Resolva as equações:
a) 2x + 5 - 5x= -1
b) -3x + 10= 2x + 8 + 1
c) 7x - 4 - x= -2x + 8 - 3x
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Verified answer
a) 2x + 5 - 5x = - 12x - 5x = - 1 - 5
- 3x = - 6 .(- 1)
3x = 6
x = 6/ 3
x = 2
b) - 3x + 10 = 2x + 8 + 1
- 3x - 2x = 8 + 1 - 10
- x = 9 - 10 .(- 1)
x = - 9 + 10
x = 1
c) 7x - 4 - x = - 2x + 8 - 3x
7x - x + 2x + 3x = 8 + 4
11x = 12
x = 12/ 11