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x = -1/4 + 4/7
x = -7/28 + 16/28
x = 9/28
b)3x - 5/6 = 10/-0,3 /*(-6)
-18x + 5 = 200
-18x = 195 /:(-18)
x = 10,83 ~ 11
c)1,4/2 = 10 - 3/4x / -5 /*(-5)
-3,5 = -50 + 3/4x
-3/4x = -50 +3,5 /*(-4)
3x = 200 - 14
3x = 186 /:3
x = 62
d) 4x+5/-4 = 4-3x/-2 /*(-4)
4x + 5 = -16 - 6x
10x = -21 /:10
x = -2,1