Bonjour je n’arrive pas à faire cet exercice de maths.Merci d’avance

Bonjour,

x + y = 5

2x - 14 = 0

x + y = 5

2(x - 7) = 0

x + y = 5

x - 7 = 0

x + y = 5

x = 7

y + 7 = 5

x = 7

y = -2

x = 7

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4x - 3y = 11

y - 2 = 9

4x - 3y = 11

y = 9 + 2

4x - 3y = 11

y = 11

4x - 3 × 11 = 11

y = 11

4x - 33 = 11

y = 11

4x = 44

y = 11

x = 11

y = 11