Question

Rozwiąż równania:
2x-2=7-x
10=4-2x
-(2x-1)=4
2(x+1)=x
2t-(3t+1)=6
-(4+x)=2(3-x)
3(y+6)-y=2(y+9)
(x-7)-2(3x+5)=3
Na jutro! ratujcie !!

Answer 1

2x-2=7-x
2x-x=7+3
x=10

10=4-2x
10-4=-2x
6=-2x  :(-2)
x=-3

-(2x-1)=4
-2x+1=4
-2x=4-1
-2x=3   : -2
x=-3/2
x= 1 1/2

2(x+1)=x
2x+2=2
2x=2-2
x=0

2t-(3t+1)=6
2t-3t-1=6
-t = 5
t = -5

-(4+x)=2(3-x)
-4-x = 6-x
-x+x = 6+4
0=10  (równanie sprzeczne)

3(y+6)-y=2(y+9)
3y+18-y=2y+18
3y-y-2y=18-18
0=0

(x-7)-2(3x+5)=3
x-7-6x-10=3
-5x=3+10+7
-5x=20   :-5
x= -4

Answer 2

2x - 2 = 7 - x 2x+x=7+2 3x=9 | /3 x=3 10 = 4 - 2x -2x=10-4 -2x=6 | /(-2) x=(-3) -(2x - 1) = 4 -2x+2=4 -2x=4-2 | /(-2) x=(-2) 2(x + 1) = x 2x+2=x 2x-x=-2 x=(-2) 2t - (3t + 1) = 6 2t-3t-1=6 -t=6+1 -t=7 |(-1) t=(-7) -(4 + x) = 2(3-x) -4-x=6-2x -x+2x=6+4 x=10 3(y + 6) - y = 2(y + 9) 3y+18-y=2y+18 2y-2y=18-18 0=0 (x-7) - 2(3x + 5) = 3 x-7-6x-10=3 -5x=3+17 -5x=20 | /(-5) x=(-4)