if a+b=20 and 2a-b=30 then what will be the value of a-b
DonDj:
Apply substitution method for this question
Elimination method to be applied
which gives the answer 10 I guess
ya you can use that also and u can use cross multiplication method too which would be much easier
Answers
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a-b is equal to 40/3..
Answered by
1
a+b = 20
2a-b = 30
3a = 50
a = 50/3 put in first eqestion
b = 20-50/3
b = 10/3
a-b = 50/3-10/3
a-n = 40/3
2a-b = 30
3a = 50
a = 50/3 put in first eqestion
b = 20-50/3
b = 10/3
a-b = 50/3-10/3
a-n = 40/3
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