Rozwiąż równanie.
b) 2x + 7 = 13
c) 7x + 4 = 3x +20
d) 9x + 10 = 4x +25
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b)
2x + 7 = 13
2x=6
x=3c)
7x + 4 = 3x +204x=16
x=4
d)
9x + 10 = 4x +255x=15
x=3
b) 2x+7 =13
2x = 13-7
2x= 6
x =3
7x -3x = 20 -4
4x = 16
x = 4
9x - 4x = 25 - 10
5x = 15
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b)
2x + 7 = 13
2x=6
x=3
c)
7x + 4 = 3x +20
4x=16
x=4
d)
9x + 10 = 4x +25
5x=15
x=3
b) 2x+7 =13
2x = 13-7
2x= 6
x =3
c) 7x + 4 = 3x +20
7x -3x = 20 -4
4x = 16
x = 4
d) 9x + 10 = 4x +25
9x - 4x = 25 - 10
5x = 15
x=3