exam Maths Puzzle Numerical Ability

sin(x+y)-2sinx+sin(x-y)/cos(x+y)-2cosx+cos(x-y)= tan x

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exam Other Question

Find the slope-intercept equation of the line that has the given characteristics
Slope 8 and y - intercept (0,6) Solve the following systems by substitution. Example 2 (p 712) and Example 4 (p 713) are the key models to go by for solving these exercises�.

4x - 12y = 5
-x + 3y = -1