a) x+5=10
x= 10 - 5
x=5
b) 2x+3=15
2x= 15 - 3
2x=12/:2
x=6
c) 5x+13=23
5x = 23-13
5x = 10/:5
x=2
d) 3x+11 = 41
3x = 41 - 11
3x = 30/:3
x = 10
e) -x+2= 8
-x= 8-2
-x = 6/:(-1)
x = -6
f) -2x - 7= 11
-2x=11+7
-2x = 18/:(-2)
x = -9
g) 2(x+3)= 10
2x + 6 = 10
2x = 10-6
2x = 4/:2
x = 2
h) 3(x-1) +2 = 8
3x - 3 + 2 = 8
3x - 1 = 8
3x = 8+1
3x = 9/:3
x = 3
i) 2(13-x) - 9 = 1
26 - 2x - 9 = 1
17 - 2x = 1
-2x = 1 - 17
-2x = -16/:(-2)
x = 8
j) 3(1-x) +2 = -7
3 - 3x +2 = -7
5 - 3x = -7
-3x = -7 - 5
-3x = -12/:(-3)
x=4
k) 3(x+3)=2(x+4)+x+1
3x + 9 = 2x + 8 +x +1
3x +9 = 3x + 9
0=0
l) 2(x -4) = 2(2x-1)+6(x+1)
2x - 8 = 4x - 2 + 6x +6
2x - 8= 10x +4
2x - 10x = 4 +8
-8x = 12/:(-8)
x = -12/8
x = -1,5
nie jestem pewna przykladu k), ale licze, ze pomoglam ;)
a) x + 5 = 10
x = 10 - 5
x = 5
b) 2x + 3 = 15
2x = 15 - 3
2x = 12 I : 2
x = 6
c) 5x + 13 = 23
5x = 23 - 13
5x = 10 I : 5
d) 3x + 11 = 41
3x = 30 I : 3
e) -x + 2 = 8
-x = 8 - 2
-x = 6 I : -1
x = (-6)
f) -2x - 7 = 11
-2x = 11 + 7
-2x = 18 I : -2
g) 2(x + 3) = 10
2x = 10 - 6
2x = 4 I : 2
h) 3(x - 1) + 2 = 8
3x = 8 + 3 - 2
3x = 9 I : 3
i) 2(13 - x) - 9 = 1
-2x = 1 - 26 + 9
-2x = (-16) I : -2
j) 3(1 - x) + 2 = (-7)
3 - 3x + 2 = (-7)
3x = (-7) - 3 - 2
3x = (-12) I : 3
x = (-4)
k) 3(x + 3) = 2(x + 4) + x + 1
3x + 9 = 2x + 8 + x + 1
3x - 2x - x = 8 + 1 - 9
0 = 0
l) 2(x - 4) = 2(2x - 1) + 6(x + 1)
2x - 8 = 4x - 2 + 6x + 6
2x - 4x - 6x = (-2) + 6 + 8
-8x = 12 I : (-8)
x = (-1,5)
Mam nadzieję, że pomogłam. Pozdrawiam ;)
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a) x+5=10
x= 10 - 5
x=5
b) 2x+3=15
2x= 15 - 3
2x=12/:2
x=6
c) 5x+13=23
5x = 23-13
5x = 10/:5
x=2
d) 3x+11 = 41
3x = 41 - 11
3x = 30/:3
x = 10
e) -x+2= 8
-x= 8-2
-x = 6/:(-1)
x = -6
f) -2x - 7= 11
-2x=11+7
-2x = 18/:(-2)
x = -9
g) 2(x+3)= 10
2x + 6 = 10
2x = 10-6
2x = 4/:2
x = 2
h) 3(x-1) +2 = 8
3x - 3 + 2 = 8
3x - 1 = 8
3x = 8+1
3x = 9/:3
x = 3
i) 2(13-x) - 9 = 1
26 - 2x - 9 = 1
17 - 2x = 1
-2x = 1 - 17
-2x = -16/:(-2)
x = 8
j) 3(1-x) +2 = -7
3 - 3x +2 = -7
5 - 3x = -7
-3x = -7 - 5
-3x = -12/:(-3)
x=4
k) 3(x+3)=2(x+4)+x+1
3x + 9 = 2x + 8 +x +1
3x +9 = 3x + 9
0=0
l) 2(x -4) = 2(2x-1)+6(x+1)
2x - 8 = 4x - 2 + 6x +6
2x - 8= 10x +4
2x - 10x = 4 +8
-8x = 12/:(-8)
x = -12/8
x = -1,5
nie jestem pewna przykladu k), ale licze, ze pomoglam ;)
a) x + 5 = 10
x = 10 - 5
x = 5
b) 2x + 3 = 15
2x = 15 - 3
2x = 12 I : 2
x = 6
c) 5x + 13 = 23
5x = 23 - 13
5x = 10 I : 5
x = 2
d) 3x + 11 = 41
3x = 41 - 11
3x = 30 I : 3
x = 10
e) -x + 2 = 8
-x = 8 - 2
-x = 6 I : -1
x = (-6)
f) -2x - 7 = 11
-2x = 11 + 7
-2x = 18 I : -2
x = -9
g) 2(x + 3) = 10
2x + 6 = 10
2x = 10 - 6
2x = 4 I : 2
x = 2
h) 3(x - 1) + 2 = 8
3x - 3 + 2 = 8
3x = 8 + 3 - 2
3x = 9 I : 3
x = 3
i) 2(13 - x) - 9 = 1
26 - 2x - 9 = 1
-2x = 1 - 26 + 9
-2x = (-16) I : -2
x = 8
j) 3(1 - x) + 2 = (-7)
3 - 3x + 2 = (-7)
3x = (-7) - 3 - 2
3x = (-12) I : 3
x = (-4)
k) 3(x + 3) = 2(x + 4) + x + 1
3x + 9 = 2x + 8 + x + 1
3x - 2x - x = 8 + 1 - 9
0 = 0
l) 2(x - 4) = 2(2x - 1) + 6(x + 1)
2x - 8 = 4x - 2 + 6x + 6
2x - 4x - 6x = (-2) + 6 + 8
-8x = 12 I : (-8)
x = (-1,5)
Mam nadzieję, że pomogłam. Pozdrawiam ;)