How do i solve 3x-4/14 = 9/10

ratios and proportions

Hello from MrBillDoesMath!

x = 83/210

Discussion:

3x -(4/14) = 9/10                           => multiply both sides by 70

70*3x - (4/14)70 = (9/10) * 70      => as 70/14 = 5 and 70/10 = 7 and 70*3 = 210

210x   - 4(5)  = 9*7                       => as 9*7 = 63

210x - 20 = 63                             => add 20 to both sides

210x = 63 + 20 = 83                    => divide both sides by 210

x = 83/210

Thank you,

MrB

I might have learned it a different way but this is the way that i do it.

3x-4/14=9/10

You change the subtraction to addition

3x+4/14=9/10

Then you change the fractions to decimals

days of the week

step-by-step explanation:

javier earned more money then kyle, so that won't always be a constant term, but the days of the week do not change so that term is always constant.

edit: i meant

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.