-4 x 10 = -40 (Negative x Positive = Negative) So just multiply it regularly and add the negative sign because one of the multiples are negative
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2 x 10^4 x 2 x 10^4 x 2 x 10^4 = 8 x 10^12 8,000,000,000,000
x+4 = 10 x = 10-4 x = 6
x-6-x-4=10-x-10=10-xx=20
If it is (4 x 10) - 3 = 37 If it is 4 x (10 - 3) = 28
- X/4 = 10 multiply through by 4 - X = 40 apply a negative 1 X = - 40 ========check in original equation - (- 40/4) = 10 40/4 = 10 10 = 10 =======checks