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qwerty384
@qwerty384
July 2022
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помогите пожалуйста♥алгебра 7 класс
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litanalove
1.a) 3a^2+a-5
b) 5-4a-5=-4a
2. a) x-3x-5+2x-4=-9
b) 3a^2-4b+5+2b-a^2-1= 2a^2-2b+4=2(a^2-b+2)
3. 3x-5+2x-7=-2, 5x-12=-2, 5x=10, x=2
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Answers & Comments
b) 5-4a-5=-4a
2. a) x-3x-5+2x-4=-9
b) 3a^2-4b+5+2b-a^2-1= 2a^2-2b+4=2(a^2-b+2)
3. 3x-5+2x-7=-2, 5x-12=-2, 5x=10, x=2