Question

Solve by cross muliplication method-
5x + 3y = 10 and 2x + 4y = 28​

Answer 1

Answer:

The equations are

⇒5x+3y−35=0

⇒2x+4y−28=0

Bycrossmultiplication

⇒

[3×(−28)−4×(−35)]

x

=

[−35×2−(−28)×5]

y

=

[5×4−2×3]

1

⇒

−84+140

x

=

−70+140

y

=

20−6

1

⇒

56

x

=

70

y

=

14

1

⇒

56

x

=

14

1

⇒14x=56⇒x=4

⇒

70

y

=

14

1

⇒14y=70⇒y=5

⇒x=4,y=5