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28x = 74 + 1,5 +90 =
28x = 165,5/28
x = 5,91
b)4x -5 +2x + 11 3(x-3) = 15
4x + 3x = 15 +5 -11 +9 =
7x = 18/7
x = 2 i 4-ry 5-te
c) x+3 : 2 + 3x -4 -(2x+1)= -14
x+3 : 2 + 3x - 4 -2x - 1 = -14
2x = -24
x = -12
Myśle że pomogłem ( chyba ci się pomyiło + i = ) :}