1)5x+4=3(6x+5)+2 2)7(3x-4)-5=9 3)6(2x+3)-2(7x-4)=23 4)7x-5(4x-5)-2(6x+7)=1 5)-11(x-2)+(2x-3)=-9x+19

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вопрос

1) 5x + 4 = 3(6x + 5) + 2
5x + 4 = 18x + 15 + 2
5x - 18x = 15 + 2 - 4
-13x = 13
x = -1

2) 7(3x - 4) - 5 = 9
21x - 28 - 5 = 9
21x - 33 = 9
21x = 42
x = 2

3) 6(2x + 3) - 2(7x - 4) = 23
12x + 18 - 14x + 8 = 23
-2x + 26 = 23
-2x = -3
x = 3/2

4) 7x - 5(4x - 5) - 2(6x + 7) = 1
7x - 20x + 25 - 12x - 14 = 1
-25x + 11 = 1
-25x = -10
x = 2/5

5) -11(x - 2) + (2x - 3) = -9x + 19
-11x + 22 + 2x - 3 = -9x + 19
-9x + 19 = -9x + 19

The solution is all real numbers for equation 5.