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a ) 9x - 3 . ( 2x + 2 ) = 15
b ) 5 . ( x - 2 ) = 3 . ( x + 4 ) + 6
Soluções para a tarefa
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a) 9x-6x-6=15 ; 3x=15-6 ; x=9/3 ; x=3
b) 5x-10=3x+12+6 ; 5x-3x=12+6+10 ; 2x=28 ; x=28/2 ; x=14
b) 5x-10=3x+12+6 ; 5x-3x=12+6+10 ; 2x=28 ; x=28/2 ; x=14
Respondido por
1
a )
9x - 3 . ( 2x + 2 ) = 15
9x - 6x - 6 = 15
3x = 15 + 6
3x = 21
x = 21/3
x = 7
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b )
5 . ( x - 2 ) = 3 . ( x + 4 ) + 6
5x - 10 = 3x + 12 + 6
5x - 10 = 3x + 18
5x - 3x = 18 + 10
2x = 28
x = 28/2
x = 14
9x - 3 . ( 2x + 2 ) = 15
9x - 6x - 6 = 15
3x = 15 + 6
3x = 21
x = 21/3
x = 7
*************************************
b )
5 . ( x - 2 ) = 3 . ( x + 4 ) + 6
5x - 10 = 3x + 12 + 6
5x - 10 = 3x + 18
5x - 3x = 18 + 10
2x = 28
x = 28/2
x = 14
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