Równania ; //
a)2,7x+3,4=1,2x+10,9
b) 4 1/3 x ( czytaj jedna trzecia )+ 2 1/6 ( czytaj jedna szósta ) = 21x+9,5
c)5,7x-9 1/3 ( czytaj jedna trzecia ) =4,4-1 2/3 x( czyt. dwie trzecie )
d)7,25x-2 1/3 (jedna trzecia ) = 2,4x+3,7
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a)2,7x+3,4=1,2x+10,9
2,7x-1,2x = 10,9-3,4
1,5x = 7,5 |:1,5
x = 5
b) 4 1/3x + 2 1/6 = 21x+9,5
4⅓x-21x = 9,5-2⅙
-16⅔x = 9 3/6-2⅙
-16⅔x = 7⅓
-50/3x = 22/3 |*(-3/50)
x = -0,44
c)5,7x-9 1/3 =4,4-1 2/3x
5,7x+1⅔x = 4,4+9⅓
5²¹/₃₀x+1²⁰/₃₀x = 4¹²/₃₀+9¹⁰/₃₀
7¹¹/₃₀x = 13 ²²/₃₀
²²¹/₃₀x = ⁴¹²/₃₀ |*30
221x = 412 |:221
x = 412/221
d)7,25x-2 1/3 = 2,4x+3,7
7,25x-2,4x = 3,7+2⅓
4,85x = 3²¹/₃₀+2¹⁰/₃₀
4,85x = 6 ¹/₃₀
4,85x = ¹⁸¹/₃₀
485/100x = ¹⁸¹/₃₀ |*(100/485)
x = 18100/14550 = 362/291 = 1 71/291