Question

solve by cross multiplication method x+y=5 and 3x+2y=8​

Answer 1

Answer:

x= -2,y=7

Step-by-step explanation:

x+y-5=0(1)

3x+2y-8=0(2)

multlipy the equation 1 with 3 and equation 2 with 1 then subtract with equation 2

3x+3y-15=0

3x+2y-8=0

-   -    +

y-7=0

y=7

substitute in equation 1

x+7=5

x=5-7

x=-2