Question

Pomocy, równania !!! :O ^^

a) (x-3)(5-x)-2=(2-x)(x-4)+3

b)(6-x)(x+2)+(x+3)(x-4)=2+5

c)(x-5)(x+2)-(3-x)(2-x)=x-12

d)(2x-5)(x+1)-2=(1-x)(8-2x)+2x

Answer 1

a) 5x-x^-15+3x= 2x-8-x^+4x+3

8x-15=6x-5

2x=10 /:2

x=5

 

b) 6x+12-x^-2x+ x^-4x+3x-12=7

9x-2x=7

7x=7 /:7

x=1

 

c)x^+2x-5x-10-(6-3x-2x+x^)=x-12

x^-3x-10-6+3x+2x-x^-x=-12

-16+x= -12

x= 4

 

d) 2x^+2x-5x-5-2=8-2x-8x+2x^+2x

2x-5x+8x=5+2+8

5x=15 /:5

x=3

Answer 2

a) (x-3)(5-x)-2=(2-x)(x-4)+3

5x-x²-15+3x-2=2x-8-x²+4x+3

4x=12 |:4

x=3

b)(6-x)(x+2)+(x+3)(x-4)=2+5

6x+12-x²-2x+x²-4x+3x-12=7

3x=7 |:3

x = 7/3 = 2 + 1/3

c)(x-5)(x+2)-(3-x)(2-x)=x-12

x²+2x-5x-10 - (6-3x-2x+x²) = x-12

x²+2x-5x-10-6+3x+2x-x²=x-12

x=4

d)(2x-5)(x+1)-2=(1-x)(8-2x)+2x

2x²+2x-5x-5-2=8-2x-8x+2x²

7x=15 |:7

x=15/7 = 2 + 1/7