Bonjour,
a) 3 × (4 + x)
3×4 + 3×x = 12 + 3x
b) 2 × (10 - y)
2×10 - 2×y = 20 - 2y
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Bonjour,
a) 3 × (4 + x)
3×4 + 3×x = 12 + 3x
b) 2 × (10 - y)
2×10 - 2×y = 20 - 2y