Bài 1:Tìm x
a)541+(218-x)=735
b)96-3(x+1)=42
c)5(x+35)=515
d)12x-33=3^2.3^3
Bài 1:Tìm x a)541+(218-x)=735 b)96-3(x+1)=42 c)5(x+35)=515 d)12x-33=3^2.3^3
By Nevaeh
By Nevaeh
Bài 1:Tìm x
a)541+(218-x)=735
b)96-3(x+1)=42
c)5(x+35)=515
d)12x-33=3^2.3^3
Đáp án:
a) `x = 24`
b) `x = 17`
c) `x = 68`
d) `x = 23`
Giải thích các bước giải:
a) `541 + (218 – x) = 735`
`=> 218 – x = 735 – 541`
`=> 218 – x = 194`
`=> x = 218 – 194`
`=> x = 24`
Vậy `x = 24`
b) `96 – 3(x + 1) = 42`
`=> 3(x + 1) = 96 – 42`
`=> 3(x + 1) = 54`
`=> x + 1 = 54 : 3`
`=> x + 1 = 18`
`=> x = 18 – 1`
`=> x = 17`
Vậy `x = 17`
c) `5(x + 35) = 515`
`=> x + 35 = 515 : 5`
`=> x + 35 = 103`
`=> x = 103 – 35`
`=> x = 68`
Vậy `x = 68`
d) `12x – 33 = 3^2 . 3^3`
`=> 12x – 33 = 243`
`=> 12x = 243 + 33`
`=> 12x = 276`
`=> x = 276 : 12`
`=> x = 23`
Vậy `x = 23`
Học tốt. Nocopy
a)541+(218-x)=735
218-x =735 – 541
218-x =194
x =218-194
x = 24
Vậy x=24
b)96-3(x+1)=42
3x+1 = 96 – 42
3x+1 = 54
x+1 = 54:3
x+1 = 18
x =18-1
x =17
Vậy x=17
c)5(x+35)=515
x+35 =515:5
x+35 = 103
x = 103-35
x =68
Vậy x=68
d)12x-33=$3^{2}$ .$3^{3}$
12x-33=9 . 27
12x-33=243
12x=243+33
12x=276
x=276:12
x=23
Vậy x=23