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10 = (4/15)*(x+3) // - (4/15)*(x+3)
10-((4/15)*(x+3)) = 0
(-4/15)*(x+3)+10 = 0
10-4/15*(x+3) = 0
10-4/15*(x+3) = 0
46/5-4/15*x = 0
46/5-4/15*x = 0
46/5-4/15*x = 0 // - 46/5
-4/15*x = -46/5 // : -4/15
x = -46/5/(-4/15)
x = 69/2
x = 69/2
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