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need explaination

2006-09-11 09:38:57 · 15 answers · asked by Anonymous in Education & Reference Homework Help

15 answers

-3/4x*28 = -3*28*x/4 = -3*7x = -21x

2006-09-11 09:40:19 · answer #1 · answered by bug 2 · 0 0

For fractions, you just multiply straight across. Numerator times Numerator and Denominator times Denominator. Remember 28 is 28/1. Once you do that, you just divide the bottom number into the top number.

Multiply the 3 times 28 to get 84 then divide the 84 by 4 which gives you 21.

Once you get good at this try it this way: First divide 4 into 28 to get 7 then multiply 7 times 3 to get 21.

2006-09-11 16:54:21 · answer #2 · answered by Dan D 1 · 0 0

you want 3/4 of 28 so first u have to see how much 1/4 is so 28 divided by 4 is 7 and you want 3 of them so 3 times 7 is 21

2006-09-11 16:42:59 · answer #3 · answered by Shintz62 4 · 0 0

-3/4x*28 = -21x
you just times -3/4 and 28... which equals -21 and the x is also in there

2006-09-11 16:39:50 · answer #4 · answered by spoof ♫♪ 7 · 0 0

The answers are infinite. Plug in any number and you will get a result. It can be simplified to

(-3/4x)(28)= (-84)/(4x)= -21x

if x=1, then -21*1= -21
if x= -37, then -21*-37= 777

2006-09-11 16:48:37 · answer #5 · answered by randyken 6 · 0 0

-3/4x*28= -21
first you convert 28 in to 28/1 then multiply 3/4 by28/1and multiping a positve by a negitive is always a negitive then convert -21/1 into -21 (but if you multiplied a negitive by a negitive or a positve by a positve it would be positive)

2006-09-11 16:56:02 · answer #6 · answered by ? 2 · 0 0

it helps me to change the fraction to a decimal. For example in your case, 3/4 x 28 would be the same as 0.75 x 28. Much easier to figure out when its a decimal.

2006-09-11 16:48:40 · answer #7 · answered by Anonymous · 0 0

you need to have something on the other side of the equation, such as -3/4x * 28 = a numerical value and then you can solve the equation

2006-09-11 16:41:08 · answer #8 · answered by CassieA 2 · 0 0

3/4*28=84/4=21x

2006-09-11 16:42:39 · answer #9 · answered by ladybug_ref 2 · 0 0

Divide the cheese wheel by the snicker doodle to the eleventeenth power. It's simple ediboligy

2006-09-11 16:42:05 · answer #10 · answered by Allen 2 · 0 0

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