Rozwiasz równania i sprawdz ich rozwiazania:
b)3(2x-1)-2(4x+3)=7-4(x+1)
c) x/4-2x/5=-3
d)2x+1/3+5-x/4=1-3x+2/6
rozwiasz równania:
a)3x+2=2x+5
b)3x-15=x-3
c)4(x+1)=6x
d)x/5+3=5
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b) 3(2x-1) -2(4x +3) = 7-4 (x+1)
6x -3 -8x -6 = 7 -4x -4
6x -8x +4x = 7 - 4 +3 +6
2x = 12 /:2
x = 6
spr.
L = 3(2*6 -1) -2(4*6 +3) = 3*11 -2*27= 33 - 54 = -21
P = 7 -4 ( 6+1) = 7 -4 *7 = 7 - 28 = -21
L + P
c) x/4 -2x/5 = -3 /*20
5x - 8x = -60
-3x = - 60 / :(-3)
x = 20
spr.
L = 20/4 -2*20/5 = 5 - 40/5 = 5 -8 = -3
P = -3
L = P
d) 2x +1/3 +5 -x/4 = 1 -3x +2/6 /*12
24x + 4 + 60 -3x = 12 -36x +4
24x -3x +36x = 12 +4 -4 -60
57x = -48 /:57
x = - 48/57
spr.
L= 2 *(-48/57)+1/3 +5 -(-48/57) :4 = -96/57 +1/3 +5 - (-48/57) *1/4 =
-1i39/57 +1/3 +5 -(-12/57)*1/1= -1i39/57 +5i19/57+12/57= -1/39/57 +5i31/37=
-1i39/57 +4i88/57 = 3 i49/57
P = 1 -3*(-48/57)+2/6 = 1 - 1 *(-48/57) +2/6= 1- (-48/19) +2/6= 1+ 48/19 +2/6=
1 +2 i10/19 +2/6= 3 i10/19 +2/6= 3i60/114 + 38/114= 3i98/114= 3i49/57
L = P
a) 3x +2 = 2x +5
3x -2x = 5 -2
x = 3
b) 3x -15 = x -3
3x -x = -3 +15
2x = 12/:2
x = 6
c) 4 (x +1) = 6x
4x +4 = 6x
4x - 6x = -4
-2x = -4 /:(-2)
x = 2
d) x/5 +3 = 5 /*5
x + 15 = 25
x = 25 - 15
x = 10