Question

ſolve the following equations by trial and error method : -
(a) 5 + 2x= 4x -
(b) Y - 3 = -5
(C) 12 - x = 7
(e) 3x + 2 = 8
(d) z + 3 = 2z
(f) 4x - 3 = 5
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Answer 1

Step-by-step explanation:

(a) 5 + 2x= 4x

5 + 2x = 4x

2x - 4x = - 5

-2x = -5

x = $\frac{-5}{-2}$ ( Both minuses get cancelled. )

x = 2.5

(b) Y - 3 = -5

y - 3 = -5

y = -5 + 3

y = -2

(C) 12 - x = 7

12 - x = 7

12 - 7 = x

x= 5

(e) 3x + 2 = 8

3x + 2 = 8

3x = 8 - 2

3x = 6

x = $\frac{6}{3}$

x = 2

(d) z + 3 = 2z

z + 3 = 2z

3 = 2z + z

3 = 3z

z = $\frac{3}{3}$

z = 1

(f) 4x - 3 = 5

4x - 3 = 5

4x = 5 + 3

4x = 8

x = $\frac{8}{4}$

x = 2