Explications étape par étape:
M = 7m + 10n + mn
M = 7×5 + 10×9 + 5×9
M = 35 + 90 + 45
M = 170
E = 8n - 4m - 6mn
E = 8×9 - 4×5 - 6×5×9
E = 72 - 20 - 270
E = -218
R = -10n + 5mn - 8n
R = -10×9 + 5×5×9 - 8×9
R = -90 + 225 - 72
R = 63
V = 5(x+9)
V = 5(11+9)
V = 5×20
V = 100
A = 9x(6x+5)
A = 9×11(6×11+5)
A = 99(66+5)
A = 99×71
A = 7 029
R = (255-5x)(7x+33)
R = (255-5×11)(7×11+33)
R = (255-55)(77+33)
R = 250×110
R = 27 500
