Sagot :

MargeSimpson1

Bonsoir,

Développer puis réduire :

A = 3(x+4)+6

A = 3x+12+6

A = 3x+18

B = 2(y+4)+3y

B = 2y+8+3y

B = 5y+8

C = (4a-5)4+5a

C = 16a-20+5a

C = 21a-20

D = 5(t+1)+4(t-6)

D = 5t+5+4(t-6)

D = 5t+5+4t-24

D = 9t+5-24

D = 9t-19

Bonne soirée.