Question

X+2y=8 under it is x-3y =6 solve it using simultaneous equation,substitution method.​

Answer 1

Explanation:

x +2y = 8 ----- (I)

x = 8 - 2y

x - 3y = 6 -------(II)

Substitute x = 8 - 2y in equation (II)

8 - 2y - 3y = 6 {add like terms}

8 - 5y = 6

Subtract 8 form both sides

-5y = 6- 8

-5y = -2

Divide both sides by -5

-5y/-5 = -2/-5

y = 2/5

Substitute y = 2/5 in equation (I)

`x+2*(2)/(5)=8\\\\x+(4)/(5)=8\\\\x=8- (4)/(5)\\\\x=(8*5)/(1*5)-(4)/(5)\\\\x=(40)/(5)-(4)/(5)\\\\x=(36)/(5)`

x = 36/5