Math-A-Day Discussion

On Problem 2, would X not equal 20 and y equal 13?

180 = (2x+5) + 75 + (1/2)x + 50

Consolidate terms

180 = 2.5x + 130

Subtract 130

50 = 2.5x

Divide by 2.5

20 = x

Also: (2x+5) = (3y+6)

Subtract 5

2x = 3y + 1

Substitute X from above

20*2 = 40 = 3y+1

Subtract 1 and divide by 3

39=3y

13=y