Question

21%of ?+16 %of 3400=1286-427

Answer 1

(21x/100)+16/100×3400=859
21x/100+544=859
21x/100=315
21x=315×100
x=15

Answer 2

Solution :

Let ? = x ,

21% of x + 16% of 3400 = 1286 - 427

=>( 21/100 )x + ( 16/100 ) × 3400 = 859

=>( 21x + 3400 )/100 = 859

=> 21x + 3400 = 85900

=> 21x = 85900 - 3400

=> 21x = 82500

=> x = 82500/21

=> x = 27500/7

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