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x in (-oo:+oo)
7*(2*x+24) = 7*(2/7)*x // - 7*(2/7)*x
7*(2*x+24)-(7*(2/7)*x) = 0
7*(2*x+24)-2*x = 0
7*(2*x+24)-2*x = 0
12*x+168 = 0
12*x+168 = 0
12*x+168 = 0 // - 168
12*x = -168 // : 12
x = -168/12
x = -14
x = -14
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