Упростите выражение:
1) -5.2a*(-4.25b)
2) 9k+8p-25k-p
3) a-(18+a)+(-a-30)
4) -5(4a-2c)-4(a-3c)
1) -5.2a*(-4.25b)
2) 9k+8p-25k-p
3) a-(18+a)+(-a-30)
4) -5(4a-2c)-4(a-3c)
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Answers & Comments
2) 9k + 8p - 25k - p = 7p - 16k
3) a - (18 + a) + (- a - 30) = a - 18 - a - a - 30 = - a - 48
4) - 5 (4a - 2c) - 4 (a - 3c) = - 20a + 10c - 4a + 12c = 22c - 24a