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Q.2 Solve the following equations:
(?) 2(x + 4) = 12
(b) 3(n – 5) = 21
(c) 3(n – 5) = -21
(d) -4(2 + x) = 8
(e) 4(2 – x) = 8

Answer :

(a) 2(x+4) = 12
= x+4 = 12/2
= x = 6-4 = 2
(b) 3(n-5 ) = 21
= n-5 = 21 /3
= n =7+5= 12
(c) 3(n-5) = -21
= n-5 = -21 /3
= n= -7 +5 = = -2
(d) -4 (2+x) = 8
= 2+x = 8/-4
= x = -2 -2 = -4
(e) 4(2- x ) = 8
= 2- x = 8/4
= -x = 2-2
= x = 0