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2/4x - 1/4x = 7/8 + 6/8
1/4x = 13/8 I *4
x = 13/2
x = 6 1/2
B) 7/9+x/2=2/3-x/181/2x + 1/18x = 2/3 - 7/9
9/18x + 1/18x = 6/9 - 7/9
10/18x = - 1/9
5/9x = -1/9 I *9/5
x = -1/9 * 9/5 = -1/5
x = -1/5