Toán Lớp 6: x – 12 – 25) = -8
175 – 5(x + 3) = 85
200 – (2x + 6) = 4^3
2x – 49 = 5.3^2
23 + 3x = 5^6 :5^3
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Toán Lớp 6: x – 12 – 25) = -8
175 – 5(x + 3) = 85
200 – (2x + 6) = 4^3
2x – 49 = 5.3^2
23 + 3x = 5^6 :5^3
Comments ( 2 )
<=>x – 12 = -8 + 25 = 17
<=>x = 17 + 12 = 29
Vậy x = 29
175 – 5(x + 3) = 85
<=>5(x + 3) = 175 – 85 = 90
<=>x + 3 = 90 : 5 = 18
<=>x = 18 – 3 = 15
Vậy x = 15
200 – (2x + 6) = 4^{3} = 64
<=>2x + 6 = 200 – 64 = 136
<=>2x = 136 – 6 = 130
<=>x = 130 : 2 = 65
Vậy x = 65
2x – 49 = 5 . 3^{2} = 5 . 9 = 45
<=>2x = 45 + 49 = 94
<=>x = 94 : 2 = 47
Vậy x = 47
23 + 3x = 5^{6} : 5^{3} = 5^{3} = 125
<=>3x = 125 – 23 = 102
<=>x = 102 : 3 = 34
Vậy x = 34