start by taking off the percents
40-33 1/3=6 2/3
then, start adding
1. 40+6 2/3=46 2/3
2. 46 2/3+6 2/3=something greater than 50
so the answer is 2
uh. @asinus by "fraction form" they do not mean "mixed number". so 21 divided by 4 in fraction form is 21/4
I don't speak russian but just apply PEMDAS:
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
...or you can just ignore the power and just do the exponent
for the first one:
2x-1=2x+3
subtract 2x from both sides and add 1 to both sides to get no solutions
10^8=100000000
10^9=1000000000
8.48*10^8=848000000, and 4.52*10^9=4520000000.
4520000000+848000000=5368000000
3mn-6m=3n
3n+15n=18n
5n+14≤13
steps:
subtract 14 from both sides and divide both sides by 5 to get n≤-1/5 (decimal form: n≤-0.2)
@Guest: 2A is A multiplied by 2
note for the future: on aops, "simplify" on equations with variables means "combine like terms then write out the equation in terms of the variable".
I use aops so trust me. I've done like 100 questions on simplifying expressions.