Question

1/185

a) 2(5a-3)-a-4(3a-2)=0

b) 2b- (1-b)=11-b

c)2/5 (x-2)=x+4

d)3y-2(y-1)=-6

e)3(3-5y)=90-5(3y-2)

f)1/4z+(z-6)=2/3(z-2)

dziękuję, prosze o pełne rozwiązanie :))

Answer 1

a) 2(5a-3)-a-4(3a-2)=0
10a-6-a-12a+8=0
-3a+2=0
-3a=-2 /:(-3)
a=2/3
b) 2b-(1-b)=11-b
2b-1+b=11-b
4b=12
b=3
c) 2/5(x-2)=x+4
2/5x- 4/5 = x+4
-3/5x=16/5
x=-16/3
d) 3y-2(y-1)-6
3y-2y+2-6=0
y=4
e) 3(3-5y)=90-5(3y-2)
9-15y=90-15y+10
0=91
f) 1/4z+(z-6)=2/3(z-2)
1/4z+z-6=2/3z-4/3
7/12z=-4/3+6
z=8

 

Proszę. : ))

Answer 2

a) 2(5a-3)-a-4(3a-2)=0

10a-6-a-12a+8=0

-3a=6-8

-3a=-2/(-3)

a=2/3

b) 2b- (1-b)=11-b

2b-1+b=11-b

3b-1=-b+11

3b+b=1+11

4b=12/4

b=3

c)2/5 (x-2)=x+4

2/5x-4/5=x+4

0.4x-0.8=x+4

0.4x-x=4+0.8

-0.6x=4.8/(-0.6)

x=-8

d)3y-2(y-1)=-6

3y-2y+2=-6

y=-6-2

y=-8

e)3(3-5y)=90-5(3y-2)

9-15y=90-15y+10

-15y+15y=-9+100

0y=91

f)1/4z+(z-6)=2/3(z-2)

1/4z+z-6=2/3z-4/3

1 1/4z-2/3z=-4/3+6

1 3/12z-8/12z=-1 1/3+6

15/12z-8/12z=-4 2/3

-7/12z=-4 2/3

-7/12z=-14/3:(-7/12)

z=-14/3*(-12/7)

z=168/21

z=8