Question

solve the equation y=3x & X+y=20 by the substitution method​

Answer 1

x + y = 20

• Substitute the Value of y

⇒ x + 3x = 20

⇒ 4x = 20

• Dividing Both Sides by 4

⇒ 4x/4 = 20/4

⇒ x = 5

Answer 2

Answer:

x = 5 and y = 15

Step-by-step explanation:

$lets \: substitute \: it \\ x + 3x = 20 \\ 4x = 20 \\ x = \frac{20}{4} \\ x = 5 \: and \: y = 15$

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