musicnbooks284
musicnbooks284
26-05-2016
Mathematics
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1/5(2x-15) + 3/5x = 4 1/4
x=?
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Аноним
Аноним
27-05-2016
1/5(2x-15) + (3/5)x = 4 1/4
x*2/5 - 15/5 + x*3/5 = 4 1/4
x*2/5 - 3 + x*3/5 = 4 1/4
x*(2/5+3/5) - 3 = 4 1/4
x*(5/5) - 3 = 4 1/4
1*x - 3 = 4 1/4
x= 4 1/4 + 3
x= 7 1/4
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