If 2.5 + 0.5-[1.6-{3.2-(3.2+2.1)+k}]=0.65, then k =
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0
Step-by-step explanation:
Given 2.5+0.05−[1.6−{3.2−(3.2+
x
2.1
)}]=0.65
⇒2.5+0.05−[1.6−{3.2−3.2−
x
2.1
}]=0.65
⇒2.55−[1.6+
x
2.1
]=0.65
⇒2.55−1.6−
x
2.1
=0.65
⇒0.95−
x
2.1
=0.65⇒
x
2.1
=0.95−0.65=0.30⇒x=
0.30
2.10
=
30
210
=7
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