Zad. z matematyki proszę o oblicznia do 21.00 plisss
a) 2x-9-x-4
b) 3(x+2)=5x+7
c) -(y+1)+5(y+2)
d) 3x+2=-(x-2)
Proszę o obliczenia
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a) 2x-9-x-4 nie ma drugiej strony równania?
x-13
b)3(x+2)=5x+7
3x + 6 = 5x + 7
-1 = 2x
-0,5 =x
c) jak w a) 4y + 9
d) 3x+2=-(x-2)
3x + 2 = -x + 2
4x = 0
x = 0
a)
2x-9-x-4 = x-13
b)
3(x+2) = 5x+7
3x+6=5x+7
-2x=7-6
-2x=1
x=-1/2
c)
-(y+1)+5(y+2) = -y-1+5y+10 = 4y+9
d)
3x+2=-(x-2)
3x+2=-x+2
4x=0
x=0