Question

2x-y=7 x+y=5 solve in substitution method

Answer 1

Answer:

the answer is X = 4 and Y = 1

Answer 2

Answer:

Here's your answer

Step-by-step explanation:

2x - y = 7 ----------- (1)

x + y = 5 ------------ (2)

Now,from eq2

we get,

x = 5 - y -------------- (3)

Now , put the value of x fron eq(3) in eq(1)

we get

2(5 - y) - y = 7

10 - 2y - y = 7

10 - 3y = 7

y = 10 - 7/3

y = 3/3

y = 1

now put the value of y in eq(3)

x = 5 - y

x = 5 - 1

x = 4

Note :- Never put value of any variable in that eq from which you have fromed the vale on one variable.

Hope you understand.

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