Homework Statement
Find the point of intersection
Homework Equations
Equation 1
y=1/5(2)4x-7
Equation 2
y=1/10(1/2)9-3x
The Attempt at a Solution
Made them equal each other got rid of the 1/5 one one side and it made the 1/10 turn into 1/2 and now i don't know...
I know double angle identities such as
sin2x = 2sinxcosx and the three cos2x ones but i can't get anything to work
I've got all the formulas but i don't know how to use them to make it work