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first, we need to define any variables
In a time crunch!!
let x represent the number of males let y represent the number of females
what is the condition they have set for us? 'there are 13 more males than there are females' right?
hence x=13+y right? can you see this?
so in total x+ y = 39 and we know x interns of y right? x=13+y so sub this into the equation (13+y)+y=39 13+2y=39 can you solve this now?
thank you so much!!
i have another one
no problem, fan and medal if you please
The sum of two numbers is 49 and the difference is 9 . What are the numbers?
we have two sets of equations. what does sum mean? and what does difference mean?
sum implies + addition difference implies - subtraction, right?
so if we have a number called x and a different number called y then x+y=49 and x-y=9
can you solve these simultaneously now?
x=9+y right, just re-arrange the second equation. then sub this equation into the first equation. (9+y)+y=49 2y=40 y=20
At a hockey game, a vender sold a combined total of 183 sodas and hot dogs. The number of sodas sold was two times the number of hot dogs sold. Find the number of sodas and the number of hot dogs sold.
x+y=183 let x be soda y=hotdogs x=2y so 2y+y=183 3y=183 y=61, x=122
the pattern is all similar, try this on your own now
so number of hotdogs would be 61