Упростите выражения: 2,4b - 46.3 + 1.7 - 8b 6.5c + 30 - 6.5c - 71 2.7d - 7.5 - 5d + 7.5

Упростим выражения:

1) 2,4 * b - 46.3 + 1.7 - 8 * b = (2,4 * b - 8 * b) + (-46,3 + 1,7) = b * (2.4 - 8) - (46.3 - 1.7) = b * (-5.6) - 44.6 = - 5.6 * b - 44.6;

2) 6.5 * c + 30 - 6.5 * c - 71 = (6.5 * c - 6.5 * c) + (30 - 71) = c * (6.5 - 6.5) + (-41) = c * 0 - 41 = - 41;

3) 2.7 * d - 7.5 - 5 * d + 7.5 = (2.7 * d - 5 * d) + (-7.5 + 7.5) = d * (2.7 - 5) = - 2.3 * d.