Question

find the value of x minus Y is equal to 1 and 2 X + Y is equal to 8 by substituting method​

Answer 1

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Hey Mate!!

x - y = 1 _________(1)

2x + y = 8

=> y = 8 - 2x _____(2)

By substituting (2) in (1),

=> x - y = 1

=> x - (8 - 2x) = 1

=> x - 8 + 2x = 1

=> 3x - 8 = 1

=> 3x = 1 + 8

=> 3x = 9

=> x = 9 ÷ 3

=> x = 3 _______(3)

By substituting (3) in (1),

=> x - y = 1

=> 3 - y = 1

=> y = 3 - 1

=> y = 2

Hope it helps...✌✌