1)Reduza as expressões abaixo:

a)17X+3y+2y - 5y - +18y

b)30z - 2X+9 - 15z+10X-3=

C)9x-7y+3z+3 - 12

D)3y+3z+2 -10

e)14y - 3z+2x - 30z​
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