Odpowiedź:
e) 9x -7 = 3x +5
9x -3x= 5+7
6x = 12/:6
x = 2
f) 3 - 10x = 9-4x
-10x+4x= 9-3
-6x = 6/:(-6)
x = -1
g) 5-2x = 9 -6x
-2x +6x = 9 -5
4x = 4/:4
x= 1
Szczegółowe wyjaśnienie:
2x-3+x=9
3x=12/:3
x=4
3x-5-x=11
2x=16/:2
x=8
x-5+6x=16
7x=21/:7
x=3
________________
9x=3x+12
6x=12/:6
x=2
10x=4x-6
6x =-6/:6
x= -1
3x=9-6x
9x=9/:9
x=1
______________
9x-7=3x+5
3-10x=9-4x
-6x=6/:(-6)
5-2x=9-6x
4x=4/:4
4+5x-2=7x-7
5x+2=7x-7
-2x= -9/:(-2)
x= 9/2=4 1/2
-8+7x+3=5x+4+4x+5
7x-5=9x+9
-2x=14/:(-2)
x= -7
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Odpowiedź:
e) 9x -7 = 3x +5
9x -3x= 5+7
6x = 12/:6
x = 2
f) 3 - 10x = 9-4x
-10x+4x= 9-3
-6x = 6/:(-6)
x = -1
g) 5-2x = 9 -6x
-2x +6x = 9 -5
4x = 4/:4
x= 1
Odpowiedź:
Szczegółowe wyjaśnienie:
2x-3+x=9
3x=12/:3
x=4
3x-5-x=11
2x=16/:2
x=8
x-5+6x=16
7x=21/:7
x=3
________________
9x=3x+12
6x=12/:6
x=2
10x=4x-6
6x =-6/:6
x= -1
3x=9-6x
9x=9/:9
x=1
______________
9x-7=3x+5
6x=12/:6
x=2
3-10x=9-4x
-6x=6/:(-6)
x= -1
5-2x=9-6x
4x=4/:4
x=1
______________
4+5x-2=7x-7
5x+2=7x-7
-2x= -9/:(-2)
x= 9/2=4 1/2
-8+7x+3=5x+4+4x+5
7x-5=9x+9
-2x=14/:(-2)
x= -7