Question

2(3x-1)=10 3(2x1-1)=30 5(x+3)=45 54(2x-4)=27

Answer 1

2(3x-1) = 10

6x - 2 = 10

6x = 12

x = 2

5(x+3) = 45

5x + 15 = 45

5x = 30

x = 6

Answer 2

2 ( 3 x - 1 ) = 10    l :  2

3 x - 1 = 5

3 x = 5 + 1

3 x = 6 ⇒    x = 6 : 3 ⇒   x = 2

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3 ( 2 x - 1 ) = 30    l   : 3

2 x - 1 = 10

2 x = 11 ⇒   x = 11 / 2 = 5,5

Obs:  E neclara ecuatia :  2x1 - 1

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5 ( x + 3 ) = 45   l   : 5

x + 3 = 45 : 5

x = 9 - 3

x = 6

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54 ( 2 x - 4 ) = 27   l : 27

2 ( 2 x - 4 ) = 1

4 x - 8 = 1

4 x = 1 + 8

4 x = 9

x = 9 / 4 ⇒  x = 2,25