Rozwiązywanie równań a)-3a+4=9a-13 b)2b-4=6b+25 c)-8c-1=-4c+6 d)-15d+7=-14d-9 e)-1 i 1/2e+ 2=-2e+3
a) -3a +4 = 9a -13
-3a -9a = -13 -4
-12a = -17 /:(-12)
a = 17/12
b) 2b -4 = 6b +25
2b -6b = 25 +4
-4b = 29 /:(-4)
b = - 29/4
c) -8c -1 = -4c +6
-8c + 4c = 6 +1
- 4c = 7 /:(-4)
c = -7/4
d) -15d +7 = -14d -9
-15d +14d = -9 -7
-d = -16 /*(-1)
d = 16
e) -1i1/2e +2 = -2e +3
- 1i1/2e + 2e = 3 -2
1/2e = 1 /:1/2
e = 1 *2/1
e = 2
a) -3a+4=9a-13 -3a-9a=-13-4 -12a=-17 a= 17/12 a=1 i 5/12
b) 2b-4=6b+25
-4b= 29 b= - 29/4 b= -7 i 1/4
c) -8c-1=-4c+6 -4c= 7 c= -7/4 c=-1 i 3/4
d) -15d+7=-14d-9 -d=-16
d=16
e) -1 i 1/2e+2=-2e+3 1/2e=1 l*2 e=2
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a) -3a +4 = 9a -13
-3a -9a = -13 -4
-12a = -17 /:(-12)
a = 17/12
b) 2b -4 = 6b +25
2b -6b = 25 +4
-4b = 29 /:(-4)
b = - 29/4
c) -8c -1 = -4c +6
-8c + 4c = 6 +1
- 4c = 7 /:(-4)
c = -7/4
d) -15d +7 = -14d -9
-15d +14d = -9 -7
-d = -16 /*(-1)
d = 16
e) -1i1/2e +2 = -2e +3
- 1i1/2e + 2e = 3 -2
1/2e = 1 /:1/2
e = 1 *2/1
e = 2
a) -3a+4=9a-13
-3a-9a=-13-4
-12a=-17
a= 17/12
a=1 i 5/12
b) 2b-4=6b+25
-4b= 29
b= - 29/4
b= -7 i 1/4
c) -8c-1=-4c+6
-4c= 7
c= -7/4
c=-1 i 3/4
d) -15d+7=-14d-9
-d=-16
d=16
e) -1 i 1/2e+2=-2e+3
1/2e=1 l*2
e=2