Question

If Chris and Lisa went shopping and spent a total of $25.50 and Lisa spent $13.50 more then Chris spent. How much did Lisa spend?

Answer 1

I think you just subtract the total - the money lisa spent

lets try it

25.50$-13.50$ = 12$

so we all know that its 12$

wanna PROVE IT , try adding 12$+13.50$ =

it will give us the total ;p

Answer 2

$x-\ Lisa\\ y-\ Chris\\\\ x+y=25.50\\ x-13.5=y\\\\ x+x-13.5=25.50\ \ \ | add\ 13.50\\\\ 2x=39\ \ \ | divide\ by\ 2\\\\ x=19.50\\\\ Lisa\ spent\ 19.50$