Question

please explain cross multiplication method​

Answer 1

Answer:

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Step-by-step explanation:

In practice, the method of cross-multiplying means that we multiply the numerator of each (or one) side by the denominator of the other side, effectively crossing the terms over.

For example

1. Solve the two variables linear equation:

8x + 5y = 11

3x – 4y = 10

Answer

On transposition, we get

8x + 5y – 11 = 0

3x – 4y – 10 = 0

By cross-multiplication method:

x/(5) (-10) – (-4) (-11) = y/(-11) (3) – (-10) (8) = 1/(8) (-4) – (3) (5)

or, x/-50 – 44 = y/-33 + 80 = 1/-32 – 15

or, x/-94 = y/47 = 1/-47

or, x/-2 = y/1 = 1/-1 [multiplying by 47]

or, x = -2/-1 = 2 and y = 1/-1 = -1

Therefore, required solution is x = 2, y = -1

Answer 2

another 1 is correct ✔✔