Question

[(x×3-5)×2-4]-[(x×3-5)×2-4]÷4-3=99 nu stiu. Va rog!!!!! Varianta marsului invers.

Answer 1

[(x*3-5)*2-4]-[(x*3-5)*2-4]:4-3=99
[x*3-5)*2-4]-(x*3-5)*2-4=102\4
[(x*3-5)*2-4]-(x*3-5)=(102\4-4)\2
[(x*3-5)*2-4]-x*3-5=86\4*1\2
[(x*3-5)*2-4]-x*3=43\4+5
[(x*3-5)*2-4]-x*3=63\20
(x*6-10-4)-x*3=63\20
x*6-14-x*3=63\20
x*3=63\20+14
x*3=(63+280)\20
x*3=343
x=343\3