Question

solve by substitution method
X+y=18, x-y =4​

Answer 1

Solution :-

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X + y = 18

X - y = 4

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X - y = 4

x = 4 + y

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Substituting you the value of x in first equation :-

4 + y - y = 4

4 = 4

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So , this equation has infinitely many solutions

Answer 2

Step-by-step explanation:

x+y=18.............1

x-y=4..............2

adding 1 and 2

2x=22. y=11-4=7

x=11.