1. (5x-6)(4x+1)=(3x+2)(7x-5)-x² 20x-24x+5x-6=21x-15x+14x-10-x² 25x-24x-6=35x-15x-10-x² x-6=20x-10-x² -6+10=20x-x-x² 4=19x-x²/:19 4/9=-x² /:(-1) 4/9=x² √4/9=x 2/3=x 2. 3(x-5) -2(4x+5) =0 3x-15-8x+10=0 -5x=-10+15 -5x=5 /:(-5) x=-1 3. (x+6) / 5 - (2x +3 ) /2 =6 x/5+6/5-2x/2-3/2=6 2x/10+12/10-10x/10-15/10=6 -8x/10-3/10=6 -8x/10=60/10+3/10 -8x/10=63/10 /*10 -8x=63 /:(-8) x=-63/8 x= 7 7/8 4. 1- ( 3x/4) = -0,5 1-3x/4=-0,5 -3x/4=-1,5 /*4 -3x=-6 /:(-3) x=2
1. (5x-6)(4x+z)=)3x+2)(7x-5)- x do kwadratu 20x2+5x-24x-6=21x2-15x+14x-10-x2 -18x=-4/-18 /(-18) x= -4/-18 2. 3(x-5)-2(4x+5)=0 3x-15-8x-10=0 -11x=0+15+10 -11x=25 /(-11) x=25/-11= -2 i 3/11 3. (x+6)/5 - (2x+3)/2=6 /*10 10*(x+6)/5-10*(2x+3)/2=6 2x+12-10x-15=60 -8x=60-12+15 -8x=63 /(-8) x= -7,875=-7 i 7/8 4. 1-(3x/4)= -0,5 /*4 4*1-4*(3x/4)=4*(-0,5) 4-3x=2 -3x=2-6 -3x=-4 /(-3) x=3/4
