Systems of linear equations word problems - Basic example | Math | SAT | Khan Academy

[@eniskofte4413]

I think you solve the question long way. I have advice for answer method. İf you say ''Hazel'' has got x keys.Leo has x+4 of course.- 2x+4=18 x=7- and then you will find easily the answer.

[@kabidzaman9432]

Great

[@hannahrepollo]

yes i did this method too, it was the first thing that came to mind!! was really fast to solve

[@Etren10]

you could set the hazel and leo equal to each other at 9 and then subtract 2 from hazel’s number and add two to leo’s (9-2=7)(9+2=11)

[@sofiaa9992]

I just solved this in my mind choose a random number for example 9 subtracting 4 and seeing if those two numbers gave me 18 took me less than a minute and I got 7

[@formagetounsi]

i remember this from primary school simply its H=(18-4)/2

[@theyonko2748]

cant be a coincidence. hazel and leo?? like hazel and leo from heroes of olympus??? holyyy crap...

[@G.7.M]

4:33

[@samiulislamdurjoy]

M 151