Toán Lớp 6: 15:(x+2) = 3
20:(1+x) = 2
5(x+35) = 515
541+(218-x) = 73
1230:3 (x-20) = 10
48-3(x+5) = 24
4x + 18 : 2=13
X-48:16 = 37
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Toán Lớp 6: 15:(x+2) = 3
20:(1+x) = 2
5(x+35) = 515
541+(218-x) = 73
1230:3 (x-20) = 10
48-3(x+5) = 24
4x + 18 : 2=13
X-48:16 = 37
Comments ( 2 )
Giải đáp:
Lời giải và giải thích chi tiết:
1)15:(x+2) = 3
x+2 = 3 x 15
x+2 = 45
x = 45-2
x = 43
2)20:(1+x) =2
1+x = 2 x 20
1+x = 40
x = 40 -1
x = 39
3)5(x+35) = 515
x+35 = 515:5
x+35 = 103
x = 103-35
x = 68
4)541+(218-x) = 73
218-x = 73-541
218-x = – 468
-x = -468 + 218
-x = -250
x = 250
5)1230:3 (x-20) = 10
3 (x-20) = 10 x 1230
3 (x-20) = 12300
x -20 = 12300:3
x-20 = 4100
x = 4100 + 20
x = 4080
6)48-3(x+5) = 24
-3(x+5) = 24 -48
-3(x+5) = -24
x+5 = -24:(-3)
x+5 = 8
x = 8-5
x = 3
7)4x + 18 : 2=13
4x + 18 = 13×2
4x = 26 – 18
4x = 8
x = 8 : 4
x = 2
8)X-48:16 = 37
x-48 = 37 x 16
x-48 = 592
x = 592 – 48
x = 544
color{red}\text{#minhlong86496}
15:(x+2) = 3
x+2 = 15 : 3
x + 2 = 5
x = 5 + 2
x = 7
20:(1+x) = 2
1+x = 20 : 2
1+x = 10
x = 10 + 1
x = 11
5(x+35) = 515
x+35 = 515 : 5
x+35 = 103
x = 103 – 35
x = 68
541+(218-x) = 73
218-x = 73 – 541
218-x = (-468)
x = 218- (-468)
x = 686
1230:3 (x-20) = 10
410x-8200 = 10
410x = 10 + 8200
410x = 8210
x = 8210 : 410
x = 821/41
48-3.(x+5)=24
3.(x+5) =48-24
3.(x+5) =24
x+5 =24:3
x+5 =8
x =8-5
x =3
4x + 18 : 2=13
4x + 9 = 13
4x = 13 – 9
4x = 4
x = 4 : 4
x = 1
x – 48 : 16 = 37
x – 3 = 37
x = 37 + 3
x = 40