Calcul littéral: réduis les écritures suivants suivantes: A= 1 - (4a + 5b - 3) + 4 + (-3a - 2)
B=5x -(2x - 3) + (7 - 3x)
C= 8 - 3y + (4y + 7) - (5y + 2) - 1
D=(7x - 13) - (-3x - 1) + 2x
E= 2- (3+0,7x) + (3 - (5x² - 3)+ (x+1) -(2x -7x²)​
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