Помогите пожалуйста # 6, 8

6.
9100:26=350, 350*26=9100
$1680 \div 28 = 60 \\ 60 \times 28 = 1680 \\ 1740 \div 29 = 60 \\ 60 \times 29 = 1740$
$1620 \div 27 = 60 \\ 60 \times 27 = 1620$
8.
$x + 42 = 25536 \\ x = 25536 - 42 \\ x = 25494$
$x \times 42 = 25536 \\ x = 25536 \div 42 \\ x = 608$
$a - 36 = 1430 + 20 \\ a - 36 = 1450 \\ a = 1450 + 36 \\ a = 1486$
$a \div 36 = 1480 - 30 \\ a \div 36 = 1450 \\ a = 1450 \times 36 \\ a = 52200$
$54135 \div b = 35 + 10 \\ 54135 \div b = 45 \\ b = 54135 \div 45 \\ b = 1203$
$54135 - b = 65 - 20 \\ 54135 - b = 45 \\ b = 54135 - 45 \\ b = 54090$