1. Решите уравнение 1) - (2x-4) - 3x=1-2 (3-2x) 2) 1/2-1/5x=1-2x

- (2x-4) - 3x=1-2 (3-2x)

-2x+4-3x=1-6+4x

-5x+4=-5+4x

-5x-4x=-5-4

-9x=-9

x=1

1/2-1/5x=1-2x

x ≠0

1/2-1/5x-1+2x=0

-1/2-1/5x+2x=0

-5x-2+20x²/10x=0

-5x-2+20x²=0

20x²-5x-2=0

x = - (-5) + - √ (-5) ²-4*20 * (-2) / 2*20

x=5+-√25+160/40

x=5+√185/40

x≠0

x=5-√185/40