Odpowiedź :
a) x+3/2 - x+1/3=3/2 /*6
3x+9-2x-2=9
x=2
b) x√2-x=x-1
x√2-x=2
x(√2-1)=2
x=2/(√2-1)
x=2*(√2+1)/(√2+1)(√2-1)
x=2√2+2
c) x+(1+x)√5=1
x+√5+x√5=1
(1+√5)x=1-√5
x=1-√5/1+√5
x=(1+5-2√5)/1-5
x=-2(√5-3)/-4
x= (√5-3)/2
d) 2(3x-2)+(x-4)² = (x-3)(x+4)
6x-4+x²+16-8x=x²-3x+4x-12
-2x+12=x-12
3x=24
x=8
e) 5(x-1)² +7(6x-1)=2(x+3)²+3(x+2)²
5x²+5-10x+42x-7=12x+2x²+18+3x²+12+12x
32x-2=24x+30
8x=32
x=4
f)
g)2x- (x+4)/3≤4x
6x-x-4≤12x
-4≤7
-4/7 ≤x
h) (2x+1)/3 -(2x+3)/2≤1/6
4x+2-6x-9≤1
-8≤2x
-4≤x
3x+9-2x-2=9
x=2
b) x√2-x=x-1
x√2-x=2
x(√2-1)=2
x=2/(√2-1)
x=2*(√2+1)/(√2+1)(√2-1)
x=2√2+2
c) x+(1+x)√5=1
x+√5+x√5=1
(1+√5)x=1-√5
x=1-√5/1+√5
x=(1+5-2√5)/1-5
x=-2(√5-3)/-4
x= (√5-3)/2
d) 2(3x-2)+(x-4)² = (x-3)(x+4)
6x-4+x²+16-8x=x²-3x+4x-12
-2x+12=x-12
3x=24
x=8
e) 5(x-1)² +7(6x-1)=2(x+3)²+3(x+2)²
5x²+5-10x+42x-7=12x+2x²+18+3x²+12+12x
32x-2=24x+30
8x=32
x=4
f)
g)2x- (x+4)/3≤4x
6x-x-4≤12x
-4≤7
-4/7 ≤x
h) (2x+1)/3 -(2x+3)/2≤1/6
4x+2-6x-9≤1
-8≤2x
-4≤x