Question

Solve by substitution method: x - y = 5 ,2x + 2y =22

Answer 1

Answer

x-y = 5 -(1)

2x + 2y=22 -(2)


x=5+y

Now putting value of x in eq (2)

2*(5+y) + 2y =22

Solving this

10 + 2y +2y=22
10+4y =22
4y = 22-10
4y = 12

y=12
———
4


y = 3
Now putting this value of y in eq (1)

x-y=5

x-3=5

x=5-3

x=2


Hence the value of x=2 & y=3



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Answer 2

• therefore ,
• x=8 and
• y=3