Rozwiąż równania :
a) dwie piąte (3 minus x)= Minus 2
b) trzy czwarte (2 minus 3x)= minus 6
c) jedna piąta (x minus 3)=9 minus x
Pilnie potrzebuję na teraz xdd.
Góry dziękuję . .! ; DD
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a)
2/5 ( 3-x) = -2 / * 5
2(3-x) = -10
6 - 2x = -10
-2x = -10 - 6
-2x = -16 / : (-2)
x = 8
b)
3/4 (2-3x) = -6 / *4
3(2-3x) = -24
6 - 9x = -24
-9x = -24 - 6
-9x = - 30 /: (-9)
x = 30/9 = 10/3
x= 3 i 1/3
c)
1/5(x-3) = 9 - x /*5
x-3 = 45 - 5x
x + 5x = 45 + 3
6x = 48 / :6
x = 8
a)
2/5(3-x)=-2
6/5-2/5x=-2
-2/5x=-2-1 1/5
-2/5x=-3 1/5/:(-2/5)
x=-16/5*(-5/2)
x=8
b)
3/4(2-3x)=-6
6/4-9/4x=-6
-9/4x=-6-1 2/4
-9/4x=-7 1/2 /:(-9/4)
x=-15/2*(-4/9)
x=10/3
x=3 1/3
c)
1/5(x-3)=9-x
1/5x-3/5=9-x
1/5x+x=9+3/5
6/5x=48/5 /:6/5
x=48/5*5/6
x=8