Mathematics: Someone please correct me i’m so confused URGENT ( i have a maths test very soon !!!)

Both problems are proportions, so cross multiply in each problem to get rid of the fractions.41. Reduce the fraction in the right side.Cross multiply.43. Cross multiply....

Someone please correct me i’m so confused URGENT

Ответ:

bks53

28.02.2023

Mathematics

Both problems are proportions, so cross multiply in each problem to get rid of the fractions.

41. $\dfrac{9}{x} = \dfrac{12}{21}$

Reduce the fraction in the right side.

$\dfrac{9}{x} = \dfrac{4}{7}$

Cross multiply.

$4x = 9 \times 7$

4x = 63

$x = \dfrac{63}{4}$

x = 15.75

43. $\dfrac{5}{2} = \dfrac{10}{x - 2}$

Cross multiply.

$5(x - 2) = 2 \times 10$

5x - 10 = 20

5x = 30

x = 6

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Someone please correct me i’m so confused

URGENT ( i have a maths test very soon !!!)

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