48.
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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
(4 - 3) x 10 x 12 - 5 = 115.
x = 4
0.0004 = 4 x 10-41 pico... = 1 x 10-124 x 10-4/1 x 10-12 = 400 million of them
I assume you mean, ( parentheses!!!) X/2 + 4 = 10 multiply through by 2 2/1(X/2 + 4 = 10)2/1 X + 8 = 20 subtract 8 from each side X + 8 - 8 = 20 - 8 X = 12 ------------------check in original equation 12/2 + 4 = 10 6 + 4 = 10 10 = 10 ----------- checks