Question

Calculati :
a) (1 supra 5 +1 supra 2 ) :10 supra 14 =
b) 4 supra 5 -2 supra 3 =
c) 7 supra 5 - 2 supra 3=
d) 3(x+5)-2(x-1) =

Answer 1

1/5+1/2):10/14=2+5/10x14/10=7/10X14/10=9,8
b)4/5-2/3=12-10/15=2/15   c)7/5-2/3=21-10/15=11/15    d)3(x+5)-2(x-1)=3x+15-2x+2=x+17