Question

x+y=20,2x+5y=46 by substitution method​

Answer 1

Answer:

$x + y = 20 \\ 2x + 5y = 46 \\ x = 20 - y \\ 2x + 5y = 46 \\ 2(20 - y) + 5y = 46 \\ 40 - 2y + 5y = 46$

$3y = 6 \\ y = 2$

$x + y = 20 \\ x + 6 = 20 \\ x = 14$

that's is your answer

Answer 2

Answer:

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Step-by-step explanation:

x+y=20

⇒ x=20-y ----(1)

2x+5y=46 ----(2)

Substituting eq(1) in (2)

2x+5y=46

2(20-y)+5y=46

40-2y+5y=46

40+3y=46

3y=46-40

3y=6

y=6/3

y=2

Putting value of y in eq(1)

x=20-y

x=20-(2)

x=18