book Maths Puzzle Numerical Ability

Write an equation in slope intercept form of the line that passes through (2,-5) with the slope of -2.

Read Solution (Total 0)

book Other Question

Simplify:
sqrt 16b^4
Sorry if the subject is wrong!

My question is:

3x-y= -3/2
4x+y=5

My work:

4x+y=5
-4x -4x

From there I get really confused! Thanks for the help!