Ответ:
a) 13 + 5x = 8-2x
5х + 2х = -13 + 8
7х = -7
х = -7/7
х = 1
б) 15x-8(3x-4)= 14
15х - 24х + 32 = 14
9х = -32+14
9х=-18
х = -18/9
х=2
в)3x-7/4-2x/3 = x+4/2 | · 12
3(3х-7) - 4 · 2х = 6(х+4)
9х - 21 - 8х = 6х + 24
9х - 8х - 6х = 21+24
-5х = 45
х = 45/(-5)
х = 9
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Ответ:
a) 13 + 5x = 8-2x
5х + 2х = -13 + 8
7х = -7
х = -7/7
х = 1
б) 15x-8(3x-4)= 14
15х - 24х + 32 = 14
9х = -32+14
9х=-18
х = -18/9
х=2
в)3x-7/4-2x/3 = x+4/2 | · 12
3(3х-7) - 4 · 2х = 6(х+4)
9х - 21 - 8х = 6х + 24
9х - 8х - 6х = 21+24
-5х = 45
х = 45/(-5)
х = 9