Mathématiques

Question

RE:(urgent)

SVP

a:5x+1=2x+19
b:8x+3=x+15
c:7,8i-8=1,3i+2

1 Réponse

  • Bonsoir

    a:5x+1=2x+19
    5x -2x = 19 -1
    3x = 18
    x = 6

    b:8x+3=x+15
    8x -x = 15 -3
    7x = 12
    x = 12/7

    c:7,8i-8=1,3i+2

    7.8 i -1.3 i = 2 +8
    6.5 i = 10
    i = 10/6 ou 5/3

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