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Undertoad · 11-06-2009, 05:11 PM

lemme lemme

(14x + 7) + (20x + 15) = 90

because of associative property of addition,
14x + 7 + 20x + 15 = 90

reduces to
34x + 22 = 90

subtract 22 from both sides
34x = 68

divide both sides by 34
x = 2

11-06-2009, 05:11 PM	#4800
Undertoad Radical Centrist Join Date: Jan 2001 Location: Cottage of Prussia Posts: 31,423	lemme lemme (14x + 7) + (20x + 15) = 90 because of associative property of addition, 14x + 7 + 20x + 15 = 90 reduces to 34x + 22 = 90 subtract 22 from both sides 34x = 68 divide both sides by 34 x = 2