Rozwiąż równania: A 1/3(3x - 2) = 2 B 5(x/5 - 3) = 315 C x+3/2 * 8 = x - 3 D 4(2x - 3/4) = 53 E 2(x + 7) = 3(2x - 5) F 3(x-5) + 7 =x + 1
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A 1/3(3x - 2) = 2
x- 2/3=2
x=2+2/3
x=2 2/3
B 5(x/5-3)=315
5x/5-15=315
x = 315+15
x = 330
C x+3/2 * 8 = x - 3
x+ 24/2 = x - 3
x +12 = x - 3
x - x = -3 -(-12)
0x= 9
sprzeczność
D 4(2x - 3/4) = 53
8x - 12/4 = 53
8x - 3= 53
8x= 53+3
8x = 56 /8
x=7
E 2(x + 7) = 3(2x - 5)
2x +14 = 6x - 15
2x-6x=-15 - (-14)
-4x= -15 + 14
-4x = -1 /-4
x= 1/4
F 3(x-5) + 7 =x + 1
3x - 15 + 7 = x + 1
3x -8 = x+1
3x -x = 8+1
2x = 9 /2
x= 9/2
x = 4 1/2
A.
x-2/3=2
x=2 i 2/3
B.
5(1/5x-3)=315
x-15=315
x=330
C.
x+3/2*8=x-3
x+12=x-3
x+15=x
15=0
Równanie sprzeczne czyli takie na ,które nie da się znaleźć odpowiedzi.
D.
8x-3=53
8x=56
x=7
E.
2x+14=6x-15
14=4x-15
29=4x
4x=29
x=7 i 1/4
F.
3x-15+7=x+1
3x-8=x+1
2x-8=1
2x=9
x=4,5