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標題:
maths
發問:
1/10(y-7)=4/5-1/2(y+9)
1/10(y-7)=4/5-1/2(y+9) (y-7)/10=4/5-(y+9)/2 (y-7)/10=8/10-(5y+45)/10 [(y-7)/10]+[(5y+45)/10]=8/10 (y-7+5y+45)/10=8/10 (6y+38)/10=8/10 6y+38=8 6y=-30 y=-5
其他解答:
1/10(y - 7) = 4/5 - 1/2(y + 9) (y - 7) / 10 + (y + 9) / 2 = 4/5 (y - 7 + 5y + 45) / 10 = 4/5 (6y + 38) / 10 = 4/5 30y + 190 = 40 30y = -150 y = -5
maths
發問:
1/10(y-7)=4/5-1/2(y+9)
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最佳解答:1/10(y-7)=4/5-1/2(y+9) (y-7)/10=4/5-(y+9)/2 (y-7)/10=8/10-(5y+45)/10 [(y-7)/10]+[(5y+45)/10]=8/10 (y-7+5y+45)/10=8/10 (6y+38)/10=8/10 6y+38=8 6y=-30 y=-5
其他解答:
1/10(y - 7) = 4/5 - 1/2(y + 9) (y - 7) / 10 + (y + 9) / 2 = 4/5 (y - 7 + 5y + 45) / 10 = 4/5 (6y + 38) / 10 = 4/5 30y + 190 = 40 30y = -150 y = -5
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