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x in (-oo:+oo)
7*(4*x+10) = 378 // - 378
7*(4*x+10)-378 = 0
7*(4*x+10)-378 = 0
28*x-308 = 0
28*x-308 = 0
28*x-308 = 0 // + 308
28*x = 308 // : 28
x = 308/28
x = 11
x = 11
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