Asked by Bryce
Whenever you cross multiply, which side do you start with first? Do i start on the left or right?
Answers
Answered by
MathMate
Left or right does not really matter. What is important is where the unknown is located.
A rule of thumb is to multiply together the two numbers beside the unknown, and divide by the one across.
If a,b,c are known, and D is not known, and the equation looks like:
a c
-=-
b D
then you could write
D=c×b÷a
or for
a b
-=-
D c
then
D=a×c÷b
A rule of thumb is to multiply together the two numbers beside the unknown, and divide by the one across.
If a,b,c are known, and D is not known, and the equation looks like:
a c
-=-
b D
then you could write
D=c×b÷a
or for
a b
-=-
D c
then
D=a×c÷b
Answered by
Bryce
thankyou!
Answered by
MathMate
You're welcome!
Answered by
Anonymous
The angryro
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