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Sagot :

ACOLOM

Réponse :

Bonjour,

1)

The product of 5 and a number is 30.

     5  *    x  =   30

     x   =  30 / 5

    x   = 6

2)

The sum of 43 and a number is 61

    43   +    x   =  61

    x  = 61  -  43

   x =  18

3)

Two less than three times a number is 28.

( 3 *  x  ) - 2  =  28

( 3 * x) = 28 + 2

3 x = 30

x = 30 / 3

x = 10

4)

Ten times a number, increased by 5.24 equals 65.24

( 10 * x  ) + 5,24 = 65,24

10 x = 65,24 -5,24

10 x = 60

x = 60 / 10

x = 6

5)

The sum of 10 and the product of 4 and a number is 22

10 + ( 4 * x ) = 22

4 x = 22 - 10

4 x = 12

x = 12 / 4

x = 3

Explications étape par étape

x ( correspond a ce que l'on cherche, l'inconnu )

*  ( pour multiplier )

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