exam Maths Puzzle Numerical Ability

w+3/4w/w-3/2w i need this simplified

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Science and medicine. The combined resistance of two resistors R1 and R2 in a parallel circuit is given by the formula.

R1= 1
---------
1 + 1
---- ----
R1 R2

Simplify Formula. Graph the following equations and find the slope of each line:
2x+4y=8
x-2y=6
y=2/3x=2
y=4

Also, finding the slope of the following points:
(6,5) and (3,3)
(4,2) and (1,6)