1. Rozwiąż równania :
a) -4(5-6z)-9(3z-2)=0
b) 5(4x+3)=2(9x-1)-3(2x+1)+4
c) -7(3x+5)-4(-2+x)=3(6x-1)+3(-x-1)
d) -[-9+2(1-2x)+(4x-3)]=5x-1
2.Rozwiąż równania :
a) 2(2x-3)+12=x-3(x+2)
b) 2(3-2x)+1=3(x-1)
c) 8(3y-2)-7y=5(12-3y)+13y
d) 2(2,5x-1)-3(x-0,2)=3,2(2x-3)
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1. Rozwiąż równania :
a)
-4(5-6z)-9(3z-2)=0
-20+24z-27z+18=0
-3z-29=0
-3z=29/:(-3)
z=-9 2/3
b)
5(4x+3)=2(9x-1)-3(2x+1)+4
20x+15=18x-2-6x-3+4
20x+15=12x-1
20x-12x=-1-15
-8x=-16/:(-8)
x=2
c)
-7(3x+5)-4(-2+x)=3(6x-1)+3(-x-1)
-21x-35+8-4x=18x-3-3x-3
-25x-27=15x-6
-25x-15x=-6+27
-40x=21/:(-40)
x=-21/40
d)
-[-9+2(1-2x)+(4x-3)]=5x-1
-[-9+2-4x+4x-3]=5x-1
-[-10]=5x-1
10=5x-1
-5x=-1-10
-5x=-11/:(-5)
x=2 1/5
2.Rozwiąż równania :
a)
2(2x-3)+12=x-3(x+2)
4x-6+12=x-3x-6
4x+6=-2x-6
4x+2x=-6-6
6x=-12/:6
x=-2
b)
2(3-2x)+1=3(x-1)
6-4x+1=3x-3
-4x+7=3x-3
-4x-3x=-3-7
-7x=-10/:(-7)
x=1 3/7
c)
8(3y-2)-7y=5(12-3y)+13y
24y-16-7y=60-15y+13y
17y-16=-2y+60
17y+2y=60+16
19y=76/:19
y=4
d)
2(2,5x-1)-3(x-0,2)=3,2(2x-3)
5x-2-3x+0,6=6,4x-9,6
2x-1,4=6,4x-9,6
2x-6,4x=-9,6+1,4
-4,4x=-8,2/:(-4,4)
x=82/44
x=1 38/44
x=1 19/22
1.
a) -4(5-6z)-9(3z-2)=0
-20+24z -27z+18=0
-3z=2/(-3)
z= -2/3
b) 5(4x+3)=2(9x-1)-3(2x+1)+4
20x+15=18x-2-6x-3+4
20x-18x+6x=-2-3+4-15
8x=-16/8
x=-2
c) -7(3x+5)-4(-3+x)=3(6x-1)+3(-x-1)
-21x-35+12-4x=18x-3-3x-3
-21x-4x-18x+3x=-3-3-12+35
40x=17/40
x=17/40
d)-[-9+2(1-2x)+(4x-3)]=5x-1
-[-9+2-4x+4x-3]=5x-1
9-2+4x-4x+3=5x-1
-5x=-11\-5
x=11/5
2.
a) 2(2x-3)+12=x-3(x+2)
4x-6+12=x-3x-6
6x=12/6
x=2
b) 2(3-2x)+1=3(x-1)
6-4x+1=3x-3
-7x= -10/-7
x= o,7
c) 8(3y-2)-7y=5(12-3y)+13y
24y-16-7y=60-15y+13y
19y=76/19
y=4
d) 2(2,5x-1)-3(x-0,2)=3,2(2x-3)
5x-2-3x+0,6=6,4x-9,6
-4,4x=-8,2/(-4,4)
x=41/22