How do you solve the simultaneous equations #4x+5y=0# and #8x-15y=5#?
1 Answer
Apr 11, 2018
Explanation:
For simultaneous equations you have to know 2 rules:
• Same signs subtract
meaning if both equations have the same sign you subtract to cancel out
•Different signs add
meaning if both equations have different signs you add to also cancel out
In this case, you will add both equations because they are of different signs
multiply the first equation by
after multiplying you'll have
now add both equations
Substitute the value of
so