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a) 5 ( x + 35 ) = 515
x + 35 = 103
x = 68
b) 96 - 3(x+1) = 49
3(x+1) = 47
x + 1 = 47/3
x = 44/3
c) 12x - 33 = 3^2 * 3^3
12x - 33 = 243
12x = 276
x = 23
5 ( x + 35 ) = 515
x + 35 = 515 : 5
x + 35 = 103
x = 103 - 35
x = 68
96 - 3( x + 1 ) = 49
3( x + 1 ) = 96 - 49
3( x + 1 ) = 47
x + 1 = 47/3
x = 47/3 - 1
x = 44/3
12x - 33 = 32 . 33
12x - 33 = 35
12x - 33 = 243
12x = 243 + 33
12x = 276
x = 276 : 12
x = 23
c)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
a, 541 + [218 - x] = 735
[ 218 - x ] = 735 - 541
[ 218 - x ] = 194
218 - x = 194
= 218 - 194
=24
a) 541 + ( 218 - x ) = 735
218 - x = 194
x = 24
b) 5 ( x + 35 ) = 515
x + 35 = 103
x = 68
c) 96 - 3 ( x + 1 ) = 42
3 ( x + 1 ) = 54
x + 1 = 18
x = 17
d ) 12x - 33 = 3 2 * 3 3
12x - 33 = 243
12x = 276
x = 23
a; 218-x=735-541
218-x=194
x=218-194
x=24
b; x+35=515/5
x+35=103
x=103-35
x=68
c;3*(x+1)=96-42
3*(x+1)=54
x+1=54/3
x+1=18
x=18-1
x=17
d;12x-33=243
12x=243+33
12x=276
x=276/12
x=23
a ) 5(x + 35 ) = 515
x + 35 = 515 : 5
x + 35 = 103
x = 103 - 35
x = 68
a) x+35=515:5
x+35=103
x= 103-35=68
b) 96-3(x+1)=42
3(x+1)=96-42=54
x+1=54:3=18
x=18-1=17
c) 12x-33=32.33
12x - 33 = 9 . 27
12x - 33=243
12x = 243 +33
12x = 276
x= 276:12
x=23
a) 80 - [130 - (12 -4)2 ]
= 80 - ( 130 - 82 )
= 80 - 116
= -36
b) 541 + (218 - b) = 735
218 - b = 194
b = 24
c) 5(x + 35) =515
x+35 = 103
x = 68
d) 96 - 3(x + 1) = 42
3(x+1) = 54
x+1 = 18
x = 17
12x - 33 = 32 . 33
12x - 33 = 243
12x = 276
x = 23
a ) 541 + ( 218 - x ) = 735
218 - x = 735 - 541 = 194
x = 218 - 194 = 24
541 + ( 218 - x ) = 735
218 - x = 735 - 541
218 - x = 194
x = 218 - 194
x = 24
5( x + 35 ) = 515
x + 35 = 103
x = 103 - 35
x = 68
96 - 3( x + 1 ) = 42
3( x + 1 ) = 96 - 42
3( x + 1 ) = 54
x + 1 = 18
x = 18 - 1
x = 17
12x - 33 = 32 . 33
12x - 33 = 243
12x = 243 + 33
12x = 276
x = 23
đây là cách giải của mk:
a, 5(x + 35) = 515
=> x + 35 = 515 : 5
=> x + 35 = 103
=> x = 103 - 35
=> x = 68
b, 12x - 33 = 32 . 33
=> 12x - 33 = 32 + 3
=> 12x - 33 = 35
=> 12x - 33 = 243
=> 12x = 243 + 33
=> 12x = 276
=> x = 276 : 12
=> x = 23
c, 6 . x - 5 = 9
=> 6 . x = 9 + 5
=> 6 . x = 14
=> x = 14 : 6
=> x = \(\frac{2}{3}\)
d, 4(x - 12) + 9 = 17
=> 4(x - 12) = 17 - 9
=> 4(x - 12) = 8
=> 4 . x - 12 = 8
=> 4 . x = 8 + 12
=> 4 . x = 20
=> x = 20 : 4
=> x = 5
a, 5 ( x + 35 ) = 515
x + 35 = 515 : 5
x + 35 = 103
x = 103 - 35
x = 68
b, 12x - 33 = 32 . 33
12x - 33 = 35
12x - 33 = 243
12x = 243 + 33
12x = 276
x = 276 : 12
x = 23
c, 6.x - 5 = 9
6x = 9 + 5
6x = 14
x = 14 : 6
x = \(\frac{7}{3}\)
d, 4.( x - 12 ) + 9 = 17
4 . ( x - 12 ) = 17 - 9
4 . ( x - 12 ) = 8
x - 12 = 8 : 4
x - 12 = 2
x = 2 + 12
x = 14