Question

8. Solve the following equations.
(i) 3x - 5 = 7
(ii) 6x-1) = 5x
(iii) x/2 + 4 = x
(iv) 7(x + 3)-2x - 1) = 33
(v) 4/3x - 2) = 2(x+1)+5​

Answer 1

Answer:

3x - 5 = 7

3x = 7 + 5

3x = 12

x = 4

6x - 1 = 5x

6x - 5x = 1

x = 1

x/2 + 4 = x

x/2 = x - 4

x = 2( x - 4)

x = 2x - 8

2x - x = 8

x = 8

7x + 21 -2x - 1 = 33

5x + 20 = 33

5x = 33 - 20

5x = 13

x = 13/5

4/3x - 2 = 2x + 2 + 5

4 - 2 × 3x ÷ 3x = 2x + 2 + 5

4 - 6x ÷ 3x = 2x + 7

4 - 6x = 6x^2 + 21x

4 = 6x^2 + 15x

6x^2 + 15x - 4 = 0

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