Question

Решите уравнения. 1) 2(x+5)=16 9)5x+4 = 3x+6 2) 3(x+1) =18 10) 5x+3 = 2x+15 3) 2(3x-5) =14 11)6x +5 =2x+1 4) 4(3x-2) = 88 12)8x-1 = 6x -5 5) 2(3x+1) = 11 13) 5(x-2) = 3(x+4) 6) 6(3x+5) =39 14)3(x-6) =2(5-2x) 7) 9(3x-5) =9 15) 2(5x+2)-2x = 3(2x+3) +7 8)3(x+7) = 15

Answer 1

1) 2(x+5) = 16+9 2x + 10 = 25 2x = 15 x = 7.5

2) 3(x+1) = 18+10 3x + 3 = 28 3x = 25 x = 8.33

3) 5x+3 = 2x+15 5x - 2x = 15 - 3 3x = 12 x = 4

4) 2(3x-5) = 14+11 6x - 10 = 25 6x = 35 x = 5.83

5) 6x + 5 = 2x + 1 6x - 2x = 1 - 5 4x = -4 x = -1

6) 4(3x-2) = 88 12x - 8 = 88 12x = 96 x = 8

7) 8x-1 = 6x-5 8x - 6x = -5 + 1 2x = -4 x = -2

8) 2(3x+1) = 11 6x + 2 = 11 6x = 9 x = 1.5

9) 5(x-2) = 3(x+4) + 6 5x - 10 = 3x + 12 + 6 5x - 3x = 28 2x = 28 x = 14

10) 6(3x+5) = 39 18x + 30 = 39 18x = 9 x = 0.5

11) 3(x-6) = 2(5-2x) + 7 3x - 18 = 10 - 4x + 7 3x + 4x = 10 + 7 + 18 7x = 35 x = 5

12) 9(3x-5) = 9 27x - 45 = 9 27x = 54 x = 2

13) 5(x-2) = 3(x+4) + 6 5x - 10 = 3x + 12 + 6 5x - 3x = 28 2x = 28 x = 14

14) 3(x-6) = 2(5-2x) + 7 3x - 18 = 10 - 4x + 7 3x + 4x = 10 + 7 + 18 7x = 35 x = 5

15) 2(5x+2) - 2x = 3(2x+3) + 7 10x + 4 - 2x = 6x + 9 + 7 8x + 4 = 6x + 16 8x - 6x = 16 - 4 2x = 12 x = 6

16) 3(x+7) = 15 3x + 21 = 15 3x = -6 x = -2