Question

Solve the following pairs of equation by the cross multiplication method x- 3y = -5 , 3x =7y -13​

Answer 1

Answer:

x = -2 and y = 1

Step-by-step explanation:

Given,

x-3y-5=0  ⇒     x-3y = 5

3x =7y -13 ⇒  3x-7y = -13

                  ⇒ 13x-39y = 15x - 35y  [ On cross multiplication]

                  ⇒ 13x-15x = -35y +39y

                  ⇒ -2x = 4y

                  ⇒  $\frac{x}{y} =\frac{-4}{2}$

                  ⇒  $\frac{x}{y} =\frac{-2}{1}$

∴ x = -2 and y = 1

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