Question

find the solution of the equations x - y = 28 and x-3y = 0. find m such that y = mx-28​

Answer 1

By using elimination method

x-y=28. - 1

x-3y=0. - 2

2y=28

y= 28÷2

y=14

Put in 1

x-14=28

x= 28+14

x= 42

To find m:

y=mx-28

14= m(42)-28

14+28 =42m

42=42m

42÷42=m

1=m