Question

Resolva a equação 7(2x-3)+2(x+1)-5(x-9)=3x+10
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Answer 1

Resposta:

x = 9,25

Explicação:

Equação

7. ( 2x - 3 ) + 2 . ( x + 1 ) - 5 . ( x - 9 ) = 3x + 10

7. ( 2x ) 7 . ( - 3 ) + 2 . ( x + 1 ) - 5 . ( x - 9 ) = 3x + 10

7. ( 2x ) + 7 . ( - 3 ) + 2 . ( x ) + 2 . ( 1 ) - 5 . ( x - 9 ) = 3x + 10

7. ( 2x ) + 7 . ( - 3 ) + 2 . ( x ) + 2 . ( 1 ) - 5 . ( x ) + 5 . ( - 9 ) = 3x + 10

14x + 7 . ( - 3 ) + 2 . ( x ) + 2 . ( 1 ) - 5 . ( x ) + 5 . ( - 9 ) = 3x + 10

14x - 21 + 2 . ( x ) + 2 . ( 1 ) - 5 . ( x ) + 5 . ( - 9 ) = 3x + 10

14x - 21 + 2x + 2 . ( 1 ) - 5 . ( x ) + 5 . ( - 9 ) = 3x + 10

14x - 21 + 2x + 2 - 5 . ( x ) + 5 . ( - 9 ) = 3x + 10

14x - 21 + 2x + 2 - 5x + 5 . ( - 9 ) = 3x + 10

14x - 21 + 2x + 2 - 5x - 45 = 3x + 10

14x + 2x - 5x - 3x = 10 + 45 - 2 + 21

16x - 5x - 3x = 10 + 45 - 2 + 21

11x - 3x = 10 + 45 - 2 + 21

8x = 10 + 45 - 2 + 21

8x = 55 - 2 + 21

8x = 53 + 21

8x = 74

x = 74 / 8

x = 9,25

Espero ter ajudado ;)