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1.5 = 2*(x/7) // - 2*(x/7)
1.5-(2*(x/7)) = 0
(-2/7)*x+1.5 = 0
1.5-2/7*x = 0 // - 1.5
-2/7*x = -1.5 // : -2/7
x = -1.5/(-2/7)
x = 5.24999992
x = 5.24999992
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