70% of 1680 + ?%of 1750=55% of 2820 -886
Answers
Answer:
The correct answer is: -29.2
Given
70% of 1680+ ?% of 1750= 55% of 2820-886
LHS=(70/100) × 1680 + (?/100) × 1750
=1176 + (?/10) × 175
RHS = (55/100) × 2820 – 886
= 1551 – 886
= 665
As we know that
LHS=RHS
1176+(?/10)*175= 665
(?/10)*175=665-1176
(?/10) × 175 = – 511
? = {(–511 × 10) /175}
?= – 29.2
Hence,we find out the value of ? is -29.2
Percentage:- It is defined as the given part in hundred. It is denoted by symbol %.
e.g in the above question ?% means ?/100.
In such type of questions as jn the above question where LHS and RHS are given and are equal. We can prove these type of questions by solving LHS and RHS separately and then equating them equal to get the answer of unknown parameter.
LHS: Left Hand Side
RHS: Right Hand Side
For more references:
https://brainly.in/question/200523?utm_source=android&utm_medium=share&utm_campaign=question
https://brainly.in/question/54105519?utm_source=android&utm_medium=share&utm_campaign=question
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