Question

solve by cross multiplication method 7x-3y=5 and x-y=2​
Please help me other wise I will be in a huge trouble ​

Answer 1

Answer:

x = - 1/4 and y = - 9/4

Step-by-step explanation:

7x - 3y -5 = 0 and x - y -2 = 0

a1 = 7 b1 = -3 c1 = -5

a2 = 1 b2 = -1 c2 = -2

x = b1c2 - b2c1 / a1b2 - a2b1

= 6-5 / -7-(-3)

x = - 1/4

y = c1a2 - c2a1 / a1b2 - a2b1

= -5-(-14) / -7-(-3)

y = - 9/4