1.Rozwiąż równanie
a) 2x+5=15 trzy/czwarte
b) 2(3x-4)=10
c) x(x-5)-x(x+4)=-63
d) 2+x/2=1-x/3
e) - x+3/5 -1=3- 5x/2
a)2x+5=15 3/4
2x=15 3/4-5
2x=10 3/4 /:2
x=43/4 * 1/2
x=43/8
x=5 3/8
b)2(3x-4)=10
6x-8=10
6x=10+8
6x=18:6
x=3
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a)2x+5=15 3/4
2x=15 3/4-5
2x=10 3/4 /:2
x=43/4 * 1/2
x=43/8
x=5 3/8
b)2(3x-4)=10
6x-8=10
6x=10+8
6x=18:6
x=3