pre-algebra question.

Jan 22, 2009 12:41



1.  43(7 - 2x) + 34 = 50(x -4.1) + 744

My attempt

43 * 7 - 43 * 2x + 34 = 50 * x - 50 * 4.1 + 744

301 - 86x + 34 = 50x - 205 + 744

301 - 34 = 267 - 86x   |  205 - 744 = 50x - (-539)

267 - 86x = 50 x + 539

267 - 86x + 86x = 50x + 539 + 86x

267 = 136x + 539 - 539

276 - 539 = 136x

-272 = 136x    | -272/ 136 = -2

Correct answer:  -1.5

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