Question

ROZWIĄŻ RÓWNANIA 1

A 3x-8=21
b x+1=5
c 8x+7=4x-1
d 3(y+6)-y=2 (y+9)
E x+2-(4x-1)=6

zadanIE 2

a 6a-12a+8a=
b 3x+5a+7x+8a=
c 20a-13b-19b-13a=
d (6x-9y)+3(y-4x)=
e (15b+7a)-(2a-3b)=
f -(x-4)-(-3x+5)=

Answer 1

Zad.1 :

a) 3x-8 =21
3x= 8+21
3x= 30
x = 10
b)
x+1=5
x=5-1
x=4
c)
8x+7 = 4x-1
4x =-8
x= -2
d)
3(y+6)-y=2 (y+9)
3y+18 -y = 2y +18
0=0
e)
x+2-(4x-1)=6
x+2-4x+a=6
-3x +3 =6
-3x =3
x= -1

Zad. 2

a)6a-12a+8a=2a
b)3x+5a+7x+8a=10x +13a
c)20a-13b-19b-13a=7a -32b
d)(6x-9y)+3(y-4x)= -6x - 6y
e) (15b+7a)-(2a-3b)= 18b + 5a
f) -(x-4)-(-3x+5)= 2x-1

Answer 2

A 3x-8=21
3x=21+8
3x=29/3
x=9r2

b x+1=5
x=5-1
x=4

c)8x+7=4x-1
8x-4x=-1-7
4x=-8/4
x=-2
d)3(y+6)-y=2 (y+9)
3y+18-y=2y+18
3y+y-2y=18-18
2y=0/2
y=0

e)x+2-(4x-1)=6
x+2-4x+1=6
-3x=6-1
-3x=5/-3
x=1r2

Zad 2
a) 6a-12a+8a=2a
b )3x+5a+7x+8a=10x+13a
c)20a-13b-19b-13a=7a-32b
d)(6x-9y)+3(y-4x)=6x-9y+3y-12x=-6x-6y
e)(15b+7a)-(2a-3b)=15b+7a-2a+3b=18b+5a
f)-(x-4)-(-3x+5)= -x+4+3x-5=2x-1