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Sagot :

a. 4n + (3n + 1) = 4n + 3n + 1 = 7n + 1

b. 17 - 2 x (-5 - x) = 17 - 2 x *-5  -2*- x = 17 +10 + 2x = 2x + 27

c. 13k - (2k + 4) x 10 = 13k - (2k*10 + 4*10) = 13k - (20k +40) =

       13k - 20k - 40 = - 7k - 40

d. 8m + 4 + (-2m - 5) =  8m + 4 -2m - 5 = 6m - 1

e. (-2t + 1) - t = -2t + 1 - t = -3t +1

f. 8(5x + 2) + 3= 8*5x + 8*2 + 3 = 40x + 16 + 3 = 40x + 19

* veut dire multiplier

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