Arthur D. answered • 02/09/15

Effective Mathematics Tutor

7x+14x+15x=180 (the sum of the 3 angles of a triangle is 180)

36x=180

x=180/36

x=5

14*5=70

14/36=x/180 will do it

cross multiply or simplify first

7/18=x/180

18*x=7*180

18x=1260

x=1260/18

x=70

or...

18*10=180 so 7*10=70