⭐Hola User_______________
⭐Here is your Answer..!!
⭐_______________________
↪Actually welcome to the concept of the Linear Equation in two variables..
↪Basically here the given equation is ..
↪3x+3y = -x+5y
↪substituing (1,2) ,we get as
↪3(1) +3 (2) = -1 + 5 (2)
↪=》 9 = 9 .. thus it is a solution
↪substituing (2,4) , we get as ..
↪3 (2) + 3 (4) = -2 + 5 (4)
↪=》 18 = 18 ...thus this is also a solution..
↪therefore. ..
↪C.) both (1,2) and (2,4) are the solutions
___________________________
〽