Question

2.
Solve the simultaneous equations
x + y = 36; 8x - y = 9​

Answer 1

Answer:

x = 5 and y = 31

Step-by-step explaination:

x + y = 36 ----------- (i)

8x - y = 9 ----------- (ii)

By adding (i) and (ii) ;

x + y + 8x - y = 36 + 9

=> 9x = 45

=> x = 45/9

=> x = 5

By putting x = 5 in (i) ;

5 + y = 36

=> y = 36 - 5

=> y = 31