Name the property of multiplication illustrated by each of the following statements :
(i) −158×−127=−127×−158
(ii) (−23×79)×−95=−23×(79×−95)
(iii) −34×(−34×−56)+(−34×78)
(iv) −169×1=1×−169=−169
(v) −1115×15−11=15−11×−1115=1
(vi) −75×0=0
Solve the following:
(i) x + 3 = 11; (ii) y − 9 = 21; (iii) 10 = z + 3; (iv) ; (v) 10x = 30; (vi) ;
(vii) ; (viii) ; (ix) 8x − 8 = 48; (x) ; (xi) ; (xii) ;
(xiii) 3 (x + 6) = 24; (xiv) ; (xv) 3(x + 2) − 2(x − 1) = 7.