rozwiąż równanie 2x + 7 =13
7x +4 = 3x + 20
9x+10=4x+25
2x + 7 =13
2x=6
x=3
4x=16
x=4
5x=15
a)2x + 7 =13
x=3b)7x +4 = 3x + 20
x=4c)9x+10=4x+25
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2x + 7 =13
2x=6
x=3
7x +4 = 3x + 20
4x=16
x=4
9x+10=4x+25
5x=15
x=3
a)2x + 7 =13
2x=6
x=3
b)7x +4 = 3x + 20
4x=16
x=4
c)9x+10=4x+25
5x=15
x=3