1) 3 + 2a + 7 + 5a = ? 2) 7b - 3 + 8 - 5b = ?

3) c + 13 + 5c - 12 = ?

4) 4 - 5d + 16 + 25d = ? ПЖ СРОЧНО 5 МИН ЕСТЬ!!!!!!!!!!
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