Mathématiques

Question

A = -27 -7 * (-5) - 2 *4
B= 3 (2x+5)-4(2-5x)

C= 5/7 - 14/25 * 15/49
D= 2/3 * 5/4 - 5/3  /  30/7

E = 1/4  + 3/4  /  1+1/8

1 Réponse

  • A = -27 -7 * (-5) - 2 *4
    A = -27 +35 - 8
    A = 0
    B= 3(2x+5)-4(2-5x)
    B = 6x + 15 - 8 + 20x
    B = 26x + 7
    C= 5/7 - 14/25 * 15/49
    C= 5/7 - 14/25 * 15/49
    C= 5/7 - 210/1225
    C = 5/7 - 6/35
    C = 25/35 - 6/35
    C = 19/35
    D= 2/3 * 5/4 - 5/3  /  30/7
    D = 10/12 - 35/90
    D = 75/90 - 35/90
    D = 4/9
    E = 1/4  + 3/4  /  1+1/8
    E = 1/4 +3/4+1/8
    E = 2/8 + 6/8 + 1/8
    E = 9/8

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