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x in (-oo:+oo)
(1/4)*(16*x-36) = 7*x-15 // - 7*x-15
(1/4)*(16*x-36)-(7*x)+15 = 0
(1/4)*(16*x-36)-7*x+15 = 0
1/4*(16*x-36)-7*x+15 = 0
1/4*(16*x-36)-7*x+15 = 0
15-3*x-9 = 0
6-3*x = 0
6-3*x = 0
6-3*x = 0 // - 6
-3*x = -6 // : -3
x = -6/(-3)
x = 2
x = 2
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