Question

4
(a) 3(2x + 3) = 2x + 69
b) 3/x+5=4/2x+4
c) x-1/4-2x-3/5=1/20
d) 2(3x-1)+3(2x-1)=2x+4(4x+3)

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Answer 1

Step-by-step explanation:

a) 6x + 9 = 2x + 69

6x - 2x = 69 - 9

4x = 60

x = 15

b) 3/x - 4/2x = 4 - 5

3/x - 4/2x = -1

6/2x - 4/2x = -1

2/2x = -1

1/x = -1

x = -1

c) LCM of 4&5 is 20

5x - 5 / 20 - 8x - 12/ 20 = 1/20

(5x - 8x - 5 - 12) / 20 = 1/20

- 3x - 17 = 1

- 3x = 18

x = -6

d) 6x - 2 + 6x - 3 = 2x + 16x + 12

12x - 5 = 18x + 12

12x - 18x = 12 + 5

- 6x = 17

x = - 17/ 6

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