zad 8
Rozwiąż równanie :
2( u - 5 ) + 15 = 3 ( u - 4 ) + 10
2(u-5)+15=3(u-4)+10
2u-10+15=3u-12+10
2u+5=3u-2
2u+5=3u
5=u
u=5
3u-2u=-12+10+10-15
u=-7
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2(u-5)+15=3(u-4)+10
2u-10+15=3u-12+10
2u+5=3u-2
2u+5=3u
5=u
u=5
2( u - 5 ) + 15 = 3 ( u - 4 ) + 10
2u-10+15=3u-12+10
3u-2u=-12+10+10-15
u=-7