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zeprea
@zeprea
July 2022
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Quem pode me ajudar trabalho de escola encontra a soluçao das seguintes equaçoes a)5x=2x=3 b)3(2-2x)=-7x c)4(2-2x)+7x=5(3+2x)
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A-) 5x = 2+3 ⇔ 5x + 5 ⇔ x = 5/5 ⇔ x = 1
b-) 3(2 - 2x) = -7x ⇔ 6 - 6x = -7x ⇔ -6x + 7x = -6 ⇔ x = -6
c-) 4(2 - 2x) + 7x = 5(3 + 2x)
8 - 8x + 7x = 15 + 10x
8 - x = 15 + 10x
- x - 10x = 15 - 8
- 11x = 7
x = - 7/11
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Verified answer
A-) 5x = 2+3 ⇔ 5x + 5 ⇔ x = 5/5 ⇔ x = 1b-) 3(2 - 2x) = -7x ⇔ 6 - 6x = -7x ⇔ -6x + 7x = -6 ⇔ x = -6
c-) 4(2 - 2x) + 7x = 5(3 + 2x)
8 - 8x + 7x = 15 + 10x
8 - x = 15 + 10x
- x - 10x = 15 - 8
- 11x = 7
x = - 7/11