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(?) 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

- Q.1 Solve the following equations: (a) 2y + (5/2) = (37/2) (b) 5t + 28 = 10 (c) (a/5) + 3 = 2 (d) (q/4) + 7 = 5 (e) (5/2) x = -5 (f) (5/2) x = 25/4 (g) 7m + (19/2) = 13 (h) 6z + 10 = – 2 (i) (3/2) l = 2/3 (j) (2b/3) – 5 = 3
- Q.3 Solve the following equations: (a) 4 = 5(p- 2) (b) -4 = 5(p – 2) (c) 16 = 4 + 3 (t + 2) (d) 4 + 5(p – 1) = 34 (e) 0 = 16 + 4(m – 6)
- Q.5 (a) Construct 3 equations starting with x = 2 (b) Construct 3 equations starting with x = -2.

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