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Coucou à tous !
Simplifier les expressions. À) 2(3x+1)+2x. B) 10y+4(3-2y) c) 5(2+2x)-3x. D) 2(2x+3)+3(2+3x)
merci davance


Répondre :

A) 2(3x+1)+2x = 2*3x + 2*1 + 2x = 6x + 2 + 2x = 8x + 2
B) 10y + 4(3-2y) = 10y + 4*3 + 4*(-2y) = 10y + 12 - 8y = 2y + 12
C) 5(2+2x)-3x = 5*2 + 5*2x - 3x = 10 + 10x - 3x = 10 + 7x
D) 2(2x+3)+3(2+3x) = 2*2x + 2*3 + 3*2 + 3*3x = 4x + 9x + 6 + 6 = 13x + 12
A = 2(3x+1)+2x
A = 6x+2+2x
A = 8x+2

B = 10y+4(3-2y)
B = 10y+(-8y)+12
B = 2y+12

C = 5(2+2x)-3x
C = 10+10x-3x
C = 7x+10

D = 2(2x+3)+3(2+3x)
D = 4x+6+6+9x
D = 13x+12

J'espère t'avoir aidé