1/3:(-2/7)-5*2/3=-7/6-10/3=-7/6-20/6=-27/6=-4,5
1) -4*(-z+7) = z+17
-4z - 28 = z + 17
3z = 45
z = 15
2) 3*(2x-5)+4x=5*(x-3)+27
6x -15 + 4x = 5x - 15 +27
6x + 4x - 5x = -15 + 27 + 15
5x = 27
x = 5,4
1152 ÷ 2 = 576
576 ÷ 16 =36
18 × 36 = 648
14 × 36 = 504
Ответ:
Пошаговое объяснение:
4 2/9×2 4/7+1 2/9×2 4/7=2 4/7×(4 2/9+1 2/9)=2 4/7×5 4/9=18/7×49/9=42/3=14
2 5/6×6 2/3-6 2/3×1 1/3=6 2/3×(2 5/6-
1 1/3)=6 2/3×1 1/2=20/3×3/2=10/1=10