Mathematics
lolokrat:

can someone pls explain to me the steps of this problem? where did the 9x and 2x come from?

lolokrat:

Vocaloid:

they multiplied both sides by 6 to get rid of the 2 and 3 denominators

lolokrat:

wouldnt that make it 18x+6=6x-18?

Vocaloid:

notice the denominator of 2 on (3x + 1)/2 multiplying by 2 gets rid of the denominator multiplying by 3 turns it into 9x + 3 multiplying by 6 simply combines these two steps

Vocaloid:

if you're having trouble understanding the arithmetic: start from the beginning, multiply both sides by 2, then multiply both sides by 3

lolokrat:

ok when i multiply both sides by 2 i get 6x+2=2x-6 then multiply both sides by 3, i get 18x+6=6x-18 am i multiplying something wrong?

Vocaloid:

(3x + 1) / 2 when you multiply by 2, the 2 in the denominator disappears, but the numerator does not change. (3x + 1) / 2 multiplied by 2 is simply 3x + 1

lolokrat:

oh, so for the right side, why would it multiply out to 2x? do we ignore the denominator on that side too?

Vocaloid:

(x/3) * 6 = 2x if you want to think about it like this: (x/3) * 3 = x then x * 2 = 2x

lolokrat:

apologies if i'm making this complicated, so after multiplying both sides by 2, i get: 3x+1=2x/3 - 6, then i multiply each side by 3 to get: 9x+3=2x-18 ^^ when multiplying by a fraction, i leave the denominator alone and just focus on the fraction?

lolokrat:

just focus on the numerator* sorry

Vocaloid:

a/b * b = a when you're multiplying by the denominator, the denominator cancels out and you're left with the numerator only

lolokrat:

ah ok thank you, that makes a lot more sense. sorry for being overcomplicated lol

lolokrat:

my brain sometimes needs an explanation to understand arithmetic :p