the substitution method

Question

DEAR,sir actually the problem is simultaneous  equations

x+y=11

xy = 30

 

how should i solve it plsss tell me the solution....

Answer 1

Try to think about what two numbers multiplied together equal 30... make a list of all these pairs of numbers you can multiply together to equal 30. Then, which of these pairs added together equals 11? And there you go!