|х + 3| = 5(х + 2)
x + 3 = 5x + 10
x + 3 - 5x - 10 = 0
-4x - 7 = 0
-4x = 7
ответ: x = 7/-4 = -1 
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2х - 3/4 = 1/3
2х - 3/4 - 1/3 = 0
2x - 9/12 - 4/12 = 0
2x - 5/12 = 0
2x = 5/12
ответ: x = 5/24
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х + 5/2 = 3х - 4/7
х + 5/2 - 3х - 4/7 = 0
-2x + 5/2 - 4/7 = 0
-2x + 35/14 - 8/14 = 0
-2x + 27/14 = 0
-2x = -27/14
ответ: x = 27/28
