Question

solve by cross multiplication method : x-3y-7=0, 2x+y-7=0​

Answer 1

Answer:

a1=1 ;a2=2;b1=-3;b2=1;c1;-7;c2:;-7

Step-by-step explanation:

x/b1c2-b2c1=x/c1a2-c2a1=x/a1b2-a2b1

By applying the values,

• x/21+7=y/-14+7=1/1
• x/28=y/-7=1/7

1st x value,

• x/28=1/7
• x=4

2nd y value,

• 2nd y value,y/-7=1/7
• 2nd y value,y/-7=1/7y=-1