bonjour j'arrive pas a ces équations svp

a. 7(2 - x) = - 2x
b. 6x = 5(3 + x)
c. 5(1-x) = -2(x + 2)
d. -3(1+ 2x) = 7(x - 5)

e. 5 + 21 = 3 + 21
f. 3y - 3 = 2y + y - 3
g. 5(z + 2) = 5z+ 10
h. 1 + 1 = 1 + 1,5​
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