Ответы на вопрос:
1) 3x - 7 = 16 - 2x
1. 3x + 2x - 7 = 16
2. 3x + 2x = 16 + 7
3. 5x = 16 + 7
4. 5x = 23
5. × = 5 2/3
2) 3x + 2x - 7 = 16
1. 3x + 2x - 7 = 16 + 7
2. 5x = 16 + 7
3. 5× = 23
4. x = 5 2/3
3) 7 - 2x = 1/5 + 35
1. 35 - 10x = x + 175
2. - 10x - x = 175 - 35
3. - 11x = 175 - 35
4. - 11x = 140
5. x = - 140/11
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