The answer is 670
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10X + 17 = 67 subtract 17 from each side 10X + 17 - 17 = 67 - 17 10X = 50 divide both sides integers by 10 (10/10)X = 50/10 X = 5 ---------------check in original equation 10(5) + 17 = 67 50 + 17 = 67 67 = 67 -------------checks
It is 6.7*10^1.
2/5 x 67/4 = 134/20 = 67/10 = 6 and 7/10
14,000,000,000 = 1.4 x 10^10
x = 100