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y= 2x
2x + y=8
Does anyone know the answer

Sagot :

Brainsoftidn

Answer:

x is 2, y is 4

Step-by-step explanation:

[tex]{ \tt{y = 2x - - - (a)}} \\ { \tt{2x + y = 8 - - - (b)}}[/tex]

» Substitute for y in equation (b) with that in equation (a)

[tex]{ \tt{2x + 2x = 8}} \\ { \tt{4x = 8}} \\ { \tt{x = 2}}[/tex]

» Find y

[tex]{ \tt{y = 2 \times 2}} \\ { \tt{y = 4}}[/tex]

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