Question

solve the 1st one by substituting method ​

Answer 1

Answer:

multiply equation 2 by 3 and solve borh eqn you will ans

x=1 and y= -3

Answer 2

Answer:y=-3

x=1

Step-by-step explanation:

2x-3y=11............(i)(all of this multiply by 5)

5x+y=2..............(ii)(all of this multiply by 2)

NB:that the equations are been multiplied by the value of x which are 2&5)

10x-15y=55

10x+2y=   4

so here you minus all the values and you will get

-17y=51

divide both sides by -17 then you will get that y=-3

for x you will do this:

2x-3(-3)=11(note that the equation is from the first step)

2x+9=11-9(you bring 9 to the side where 11 is to be left with x on one side only)

2x=2

divide both sides by 2 to get x=1