Question

solve the equation 3x-7y+10=0
y-2y-3=0 by cross multiplication method​

Answer 1

Step-by-step explanation:

by cross multiplication mathod

x/b1a2 - a1b2 = y/ a1c2 - c1a2 = 1/ c1b2 - b1c2

where,

a1 = 3, b1= -7, c1 = 10,

a2 =1, b2 =-2, c2 = -3

on substituting values

x/(-7)(1) - (3)(-2) = y/ (1)(-3) - (10)(1) = 1/(10)(-2) - (-7)(-3)

x/-7+6 = y/-3-10 = 1/-20-21

seperating

x/-1 =1/-41 and y/-13 = 1/-41

x=1/41 and y = 13/41