Question

c) 3(2x - 3) + 2(x + 1) = 3x + 18
d) 2x + 3(x - 5) = 4x + 9
e) 2(x + 1) - 3(2x - 5) = 6x - 3​

Answer 1

c) 6x - 9 + 2x + 2 = 3x + 18

(6 + 2)x - 9 + 2 = 3x + 18

8x - 7 = 3x + 18

(8 - 3)x = 18 + 7

5x = 25

x = 25/5

x = 5

d) 2x + 3x - 15 = 4x + 9

(2 + 3)x - 15 = 4x + 9

5x - 15 = 4x + 9

(5 - 4)x = 9 + 15

x = 24

e) 2x + 2 - 6x + 15 = 6x - 3

(2 - 6)x + 2 + 15 = 6x - 3

-4x + 17 = 6x - 3

(-4 - 6)x = -3 - 17

-10x = - 20 (-1)

10x = 20

x = 20/10

x = 2

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