76
a)
je calcule donc 5x + 8x - 3x
on aura = (5+8-3)x = 10x
b)
p + 0,03p = 1p + 0,03p = (1+0,03)p = 1,03p
c)
5 * 2y + 5 * (-3) + 11 = 10y - 15 + 11 = 10y - 4
d)
2*z + 2*1,5 - 0,1z = 2z - 0,1z + 3 = 1,9z + 3
e)
4 * 6t + 4 * (-6) = 24t - 24
et
-24 * 1 - 24 * (-t) = 24t - 24
f)
2*n+2*3 - 3*n-3*(-5)
= 2n+6-3n+15
= -n + 21 = 21-n
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76
a)
je calcule donc 5x + 8x - 3x
on aura = (5+8-3)x = 10x
b)
p + 0,03p = 1p + 0,03p = (1+0,03)p = 1,03p
c)
5 * 2y + 5 * (-3) + 11 = 10y - 15 + 11 = 10y - 4
d)
2*z + 2*1,5 - 0,1z = 2z - 0,1z + 3 = 1,9z + 3
e)
4 * 6t + 4 * (-6) = 24t - 24
et
-24 * 1 - 24 * (-t) = 24t - 24
f)
2*n+2*3 - 3*n-3*(-5)
= 2n+6-3n+15
= -n + 21 = 21-n