Question

a) 5(x - 1,2) - 3x = 2
б) 3/4ч = 27
в) (2 + 3x) - (4x - 7) = 10
г) 2(x - 1,5) + x = 6
д) 2/3x = 18

(2x - 5) - (3x - 7) = 4

Answer 1

a) 5(x - 1,2) - 3x = 2

5x - 6 - 3x = 2

2x = 8

x = 4

б)

$\frac{3}{4} x=27\\\\x=27:\frac{3}{4}=27*\frac{4}{3}=36$

в) (2 + 3x) - (4x - 7) = 10

2 + 3x - 4x + 7 = 10

- x = 10 - 2 - 7

- x = 1

x = - 1

г) 2(x - 1,5) + x = 6

2x - 3 + x = 6

3x = 6 + 3

3x = 9

x = 3

д)

$\frac{2}{3}x=18\\\\x=18:\frac{2}{3}=18*\frac{3}{2}=27$

е) (2x - 5) - (3x - 7) = 4

2x - 5 - 3x + 7 = 4

- x = 4 + 5 - 7

- x = 2

x = - 2

Answer 2

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