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4x - 2x - 6x = 3/4 - 2/3 - 1/2
-4x = 9/12 - 8/12 - 6/12
-4x = -5/12
x = -5/12 : -4
x = 5/12 : 4/1
x = 5/12 X 1/4
x = 5/3
2.) n/2 = n/7 - 10
n/2 - n/7 = -10
7n/14 - 2n/14 = -10
5n/14 = -10
5n = -10 X 14
5n = -140
n = -140 / 5
n = -28