Diketahui a + 1 = b + 2 = c + 3 = d + 4 = a + b + c + d + 5. Nilai dari a + b + c + d = ....
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Jawaban:
a +1=b+2 => b=a-1
a+1=c+3 => c=a-2
a+1=d+4 => d=a-3
a+1=a+b+c+d+5 => a+1=a+(a-1)+(a-2)+(a-3)+5
=> a+1=4a-1
=> a-4a= -1-1
=> -3a= -2
=> a= 2/3
b=2/3 - 1 = - 1/3
c=2/3 - 2 = - 4/3
d=2/3 - 3 = -7/3
a+b+c+d = 2/3+(-1/3)+(-4/3)+(-7/3)
= -10/3
[answer.2.content]
