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8x-7 =6x-12
8x-6x=7-12
2x=-5
x=-5/2
x=-2,5
⇒2x+5=2.(-2,5)+5
=-5+5
=0
8x-7 = 6x-12
2x=-5
x= -5/2 = -2,5
nilai dari 2x+5
2(-2,5)+5 = -5+5 =0
nilainya 0