Proszę o rozwiązanie:
1. 8x-5x*18
9*5b+8z
23+(28*x)
x*2x
18x-(2*x)
(x-13-5b)
7+2x*2
12*x+2*3x
x-13+10x*8x
15x*18x
2.(19-4x):3
18:x
425:25x
745-45:x
5*3:5x
13x:3x
(x-6):9
(18-9):2x
48*2:x
10x:2
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23+(28*x)= 23+28x; 28x=-23/:28 ; x= - 23/28
x*2x= 2x do kwadratu
18x-(2*x)= 18x-2x=16x
7+2x*2= 7+4x ; x=-7/4
12*x+2*3x = 12x+6x= 18x
x-13+10x*8x= x-13+80x do kwadratu
15x*18x=270 x do kwadratu
2.(19-4x):3= (19-4x)*1/3= 19/3 - 4x/3
18:x= 18/x
425:25x= 17x