Răspuns :
a) 4x(3+2+4) = 12x + 8x + 16x = 36x
SAU
4x*9 = 36x
b) 45x - 15x - 25x = 5x
SAU
5x*1 = 5x
SAU
4x*9 = 36x
b) 45x - 15x - 25x = 5x
SAU
5x*1 = 5x
4x(3+2+4)=4x9=36 4x(3+2+4)=4x3+4x2+4x4=12+8+16=36
5x( 9-3-5)=5x1=5 5x(9-3-5)=5x9-5x3-5x5=45-15-25=5
5x( 9-3-5)=5x1=5 5x(9-3-5)=5x9-5x3-5x5=45-15-25=5