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Yvonne is thinking of a number. Fifty, decreased by three times the number, is the same as seven times the number, increased by 80. What is Yvonne's number?
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Mar 21, 2015
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Yvonne is thinking of a number. Fifty, decreased by three times the number, is the same as seven times the number, increased by 80. What is Yvonne's number?
Mathematics
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Gildas
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(50-3)x=7x+80
50x-3x=7x+80
47x=7x+80
-7x -7x
40x=80
40x/40=80/40
x=2
Brobes
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Mar 23, 2015
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50 - 3x = 7x + 80
50 = 10x + 80
-30 = 10x
x = -3
Richard Green
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Mar 28, 2015
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