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4x-5= 6x+3
4x-6x = 3+5
-2x = 8
x = -4
7-x = 7-(-4) = 11
4x - 5 = 6x + 3
4x - 6x = 3 + 5
-2x = 8
x = 8 : (-2)
x = -4
jadi, 7 - x
7 - (-4)
= 7 + 4
= 11