Question

solve the
following simultaneous
equations
3x+3y=13.5 5x+3y=85​

Answer 1

hope it will help you:-)

Answer 2

Step-by-step explanation:

3x + 3y = 13.5 ............( 1 ).

5x + 3y = 85............( 2 ).

3subtract equation ( 1 ) from( 2 ).

5x + 3y = 85

-3x + 3y = 13.5

= 2x = 71.5

× = 71.5÷2

x = 357.5

put x = 357.5 in equation ( 1 ).

3x + 3y = 13.5

3 × 357.5 + 3y = 13.5

1072.5 + 3y = 13.5

3y = 13.5 - 1072.5

3y = - 1059.0

y = -1059.5 ÷ 3

y = - 353.0

solution ( x , y ) = ( 357.5 , 353.0 )