a)
3x - 7 = 2x +4
3x - 2x = 4 + 7
x = 11
b)
6x + 2 = 5x - 7
6x - 5x = -7 -2
x = -9
c)
4a + 7 = 16 - 3a
4a + 3a = 16 -7
7a = 9 l : 7
a = 9/7
a = 1 i 2/7
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a)
3x - 7 = 2x +4
3x - 2x = 4 + 7
x = 11
b)
6x + 2 = 5x - 7
6x - 5x = -7 -2
x = -9
c)
4a + 7 = 16 - 3a
4a + 3a = 16 -7
7a = 9 l : 7
a = 9/7
a = 1 i 2/7