ICSE Class 9 Maths Simultaneous (Linear) Equations

algebra
question 15
 the some of the numerator and denominator of a fraction is 2 more than twice the numerator if the numerator and the denominator are reduced by 3 thay are in ratio 3:4 find the fraction
 2x3Y13=0;3X+5Y=16 stimulation method
 X+y=6 Xy=4 Find xy
 1. 8x+5y=9 3x+2y=4 linear equation
 3x + 4y =10 and 2x  2y = 2
 When a two digit number is divided by the sum of its digits, the quotient is 7. If the ten's digit is diminished by twice the unit's digit, the remainder is zero. What is the number?
 solve 4/X + 3/4=2 , 3/X  2/4=5 by elimination method
 How to solve By elimination method
 How to solve 5x + 7y = 66 2x  3y = 20 By elimination method.