Question

Which of the following equations is equivalent to y = 2/3 x + 1/4?
y = 8x + 3
12y = 2x + 1
12y = 8x + 3

Answer 1

take LCM on RHS and cross multiply

Answer 2

?

Answer 3

taking LCM on RHS,,we have y = (8x + 3)/12
now cross multiplying,,we get 12y=8x +3 ..which is the answer..

Answer 4

leme tell you a shortcut here..from the given original equation,,for some random x,,calculate y..and try and match it up with the options..
e.g. from eqn,,at x=0,y=1/4..
now from the given options,,only last one satisfies this..
Note: this wont work everytime,,sometimes the examiners are way to smart.. ;)