Rozwiąż równania:
a) 4 + 2x = 9
b) 5x - 7 = 11
c) 6x + 5 = 4 + 5x
d) 2 + 3x = 6 - x
w ten sposób:
a) 4 + 2x = 9 /-4
2x = 5 /:2
x = 2,5 :)
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B) 5x - 7 = 11
5x=11+7
5x=18 /: 5
x=3,6
c) 6x + 5 = 4 + 5x
6x-5x=4-5
x=-1
d)2 + 3x = 6 - x
3x+x=6-2
4x=4/:1
x=1
a. 4+2x=9
2x=9-4
2x=5 /:2
x=2,5