Solve x+54−3x−18+4−x6=2124 and find the value of x.
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.