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(5/7)*x-(2*x)+3/10 = -93/140 // + -93/140
(5/7)*x-(2*x)+3/10-(-93/140) = 0
(5/7)*x-2*x+3/10+93/140 = 0
27/28-9/7*x = 0 // - 27/28
-9/7*x = -27/28 // : -9/7
x = -27/28/(-9/7)
x = 3/4
x = 3/4
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